Tag Archives: John L. Leal

August 28, 1869: Birth of Allen Hazen; 1882: Death of John Rose Leal

August 28, 1869: Birth of Allen Hazen. “Allen Hazen (1869–1930) was an expert in hydraulics, flood control, water purification and sewage treatment. His career extended from 1888 to 1930 and he is, perhaps, best known for his contributions to hydraulics with the Hazen-Williams equation. Hazen published some of the seminal works on sedimentation and filtration. He was President of the New England Water Works Association and Vice President of the American Society of Civil Engineers.

During a year spent at MIT (1887-8), Hazen studied chemistry and came into contact with Professor William T. Sedgwick, Dr. Thomas M. Drown and fellow students George W. Fuller and George C. Whipple. As a direct result of his association with Dr. Thomas M. Drown, Hazen was offered his first job at the Lawrence Experiment Station in Lawrence, Massachusetts. LES was likely the first institute in the world devoted solely to investigations of water purification and sewage treatment. From 1888 to 1893, Hazen headed the research team at this innovative research institute into water purification and sewage treatment.

Hazen is most widely known for developing in 1902 with Gardner S. Williams the Hazen-Williams equation which described the flow of water in pipelines. In 1905, the two engineers published an influential book, which contained solutions to the Hazen-Williams equation for pipes of widely varying diameters. The equation uses an empirically derived constant for the “roughness” of the pipe walls which became known as the Hazen-Williams coefficient.

In 1908, Hazen was appointed by President Theodore Roosevelt to a panel of expert engineers to inspect the construction progress on the Panama Canal with President-Elect William H. Taft. Hazen specifically reported on the soundness of the Gatun Dam (an integral structure in the canal system), which he said was constructed of the proper materials and not in any danger of failure.

Hazen’s early work at the Lawrence Experiment Station established some of the basic parameters for the design of slow sand filters. One of his greatest contributions to filtration technology was the derivation of two terms for describing the size distribution of filter media: effective size and uniformity coefficient. These two parameters are used today to specify the size of filter materials for water purification applications. His first book, The Filtration of Public Water Supplies, which was published in 1895, is still considered a classic.

His first assignment as a sole practitioner in 1897 was the design of the filtration plant at Albany, New York. The plant was the first continuously operated slow sand filter plant in the U.S.

One of his early assignments was as consultant to Pittsburgh, Pennsylvania, to determine the best method of providing a safe water supply from the Monongahela River. For decades, the City had been wracked with typhoid fever epidemics. At the time, mechanical filtration (or rapid sand filtration was just beginning to be understood as a treatment process. As a conservative engineer, Hazen recommended that the City install slow sand filters to remove both turbidity and harmful bacteria from its water supply. As early as 1904, Hazen recommended the filtration of the Croton water supply for New York City. As of 2013, a new filtration plant on that water supply is nearing completion.

Hazen received honorary degrees of Doctor of Science from both New Hampshire College of Agriculture and Mechanical Arts (1913) and Dartmouth College (1917). In 1915, he received the Norman Medal which is the highest honor given by the American Society of Civil Engineers for a technical paper that “makes a definitive contribution to engineering science.” He was selected as an Honorary Member of the American Water Works Association in 1930. In 1971, he was inducted into the AWWA Water Industry Hall of Fame with his friend and colleague, George W. Fuller.”

Commentary: This entry is part of the biographical entry for Hazen in Wikipedia that I wrote in June 2012. I did not know much about him until I wrote the article. He was truly an amazing engineer who excelled at everything that he was engaged in.

August 28, 1882: Death of John Rose Leal. John Rose Leal was born on October 20, 1823 (or possibly 1825 or 1827) in Meredith, Delaware County, New York. His parents were John Leal and Martha McLaury who were descended from early settlers of Delaware County, New York. There are records that John Rose Leal’s great-grandfather Alexander Leal was born in Scotland in 1740 and immigrated to the British colonies in North America, landing in New York City on April 13, 1774. On John R. Leal’s mother’s side, his ancestors came from Ireland and Scotland.

There is little information on John R. Leal’s early years. According to one source, he received his preliminary education at the Literary Institute, in Franklyn, Delaware County, New York and at the Delaware Academy in Delhi, New York.

John Rose Leal received his medical training under Dr. Almiran Fitch of Delhi, New York and completed his medical degree at Berkshire Medical College. Located in the westernmost regions of Massachusetts, Berkshire County, the medical college was in a remote part of the young country separated from the rest of the state by the Berkshire Mountains. The mission of Berkshire Medical College was to train doctors to serve the sparsely populated rural areas that were dominated by agriculture. Founded in 1822 as the Berkshire Medical Institution, the school had to overcome resistance from Harvard Medical School that objected to the establishment of another medical training facility in Massachusetts. With a student population of about 30 in the 1840s, a medical education was offered to students for the magnificent sum of $140 per year.

John Rose Leal received his medical degree in 1848 and shortly thereafter opened up a medical practice in Andes. Dr. Leal continued his education with a post-graduate course at the Columbia College of Physicians and Surgeons in New York City—an institution that would figure prominently in one son’s education.

There is a limited amount information about his wife, Mary Elizabeth Laing, from historical records. Born in 1837, the fourth child of eight children, she was the daughter of Rev. James Laing of Andes, NY. She was born in Andes, NY, after the family moved there from Argyle, NY. Her father was the pastor of the Presbyterian Church of Andes.

John Rose Leal and Mary E. Laing were married in Andes on August 29, 1855. Mary E. Laing was only 18 when she married the successful country doctor. John L. Leal was born to the couple on May 5, 1868. Census records from 1860 show that another child was born to the couple about 1859 in Andes, William G. Leal. Another brother was born much later in Paterson, New Jersey, about 1870, Charles E. Leal. There are no records showing that William G. Leal survived into adulthood. Charles E. Leal lived to the age of 24 and died in 1894 in Paterson.

The simple rural life in Andes, New York was shattered by the Civil War in 1862 when the 144th Regiment, New York Volunteers was formed in Delaware County and the surrounding area. John R. Leal’s first appointment was as regimental surgeon and over the next three years he was promoted to surgeon at the brigade, division and corps levels. Toward the end of the war he held the title of Medical Director in the Department of the South. According to an obituary, Dr. Leal was wounded twice and was with his regiment at the battle of John’s Island.

The 144th Regiment was stationed on Folly Island in 1863 as part of the siege of Charleston, South Carolina. According to the history of the regiment, “very nearly every man in the Regiment got sick…with bad and unhealthy water to drink.” The only treatment at the time for the debilitating dysentery that overwhelmed the Regiment was the administration of “opium pills” by Dr. Leal. The pills did not cure anything but they made the recipients feel somewhat better. Dr. Leal became so ill that he received medical leave for a time, but it is clear from the records that he never fully recovered.

Dr. Leal was mustered out of the 144th Regiment on June 25, 1865 after which time he returned to his simpler life in Andes, New York. However, he brought a dreadful souvenir of the war home with him and he suffered with it for the next 17 years.

In one obituary, it was stated: “…his death, which resulted from an attack of peritonitis of an asthenic character, sequel to an attack of dysentery, which at the outset did not indicate an unusual degree of severity, but was undoubtedly aggravated by the chronic diarrhea from which he had been a sufferer more or less constantly since his retirement from the army.”

Another obituary was equally clear as to the cause of his death: “He never recovered from the effects of disease contracted on Folly Island, and this induced other complications, resulting in his death.”

Reference: McGuire, Michael J. 2013. The Chlorine Revolution: Water Disinfection and the Fight to Save Lives. Denver, CO:American Water Works Association.

Commentary: Dr. John Rose Leal was the father of Dr. John L. Leal who was responsible for the first chlorination of a U.S. public water supply—see The Chlorine Revolution.

Reference: McGuire, Michael J. 2013. The Chlorine Revolution: Water Disinfection and the Fight to Save Lives. Denver, CO:American Water Works Association.

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August 20, 1831: Birth of Eduard Suess; 1914: Disinfection of Sewage Plant Effluents

August 20, 1831: Birth of Eduard Suess, Austrian geologist.
He developed the plan for a 69-mile (112-kilometre) aqueduct (completed 1873) that brought fresh water from the Alps to Vienna. http://www.britannica.com/EBchecked/topic/571632/Eduard-Suess

At the age of nineteen he published a short sketch of the geology of Carlsbad and its mineral waters… n 1862 he published an essay on the soils and water-supply of Vienna http://www.nndb.com/people/266/000097972/

In 1864, the Vienna City Council voted the construction of the First Vienna Spring Water Main, which to this day covers approximately 40 percent of Vienna’s water requirements. It was planned by the geologist and City Council member Eduard Suess and implemented under Mayor Cajetan Felder. The main was to safeguard adequate drinking water supply even for the suburbs and to improve its quality, thereby excluding any further health hazards for the population.

After a construction period of only three years, the First Vienna Spring Water Main was inaugurated on 24 October 1873 by Emperor Francis Joseph I concurrently with the Hochstrahlbrunnen Fountain in Schwarzenbergplatz. The pipeline is 120 kilometres long, cost 16 million Gulden to build and soon became a symbol of Vienna’s liberation from water shortages and dangers of epidemics. In residential buildings, the formerly used domestic wells were gradually replaced by communal water taps. In 1888, over 90 percent of residential buildings situated within Vienna’s (then) municipal territory were already connected to the new main.

http://www.wien.gv.at/english/environment/watersupply/supply/history/first-pipeline.html

August 20, 1914: Municipal Journal article. Operation of Sewage Disposal Plants—Disinfection. “Having determined upon the size of the dose, the next thing is to apply it to the sewage or effluent at a uniform rate. The best practice is to dissolve the required number of pounds in a given amount of water and feed the solution at a definite rate proportional to the flow of liquid to be disinfected. This is not so simple as one might at first suspect. Several things have to be looked out for. The commercial dry powder varies in strength and loses strength considerably when exposed to the air. There must be sufficient water to dissolve out the hypochlorite, and care must be used in mixing the solution. The solution is corrosive and acts on tanks, piping, valves, etc., and it also forms incrustations which cause frequent stoppages in pipes, valves and feeding devices.

Unless it is feasible to analyze each lot of bleach, it should be bought with the available chlorine specified by the dealer. As the material deteriorates upon opening, the contents of a whole container should be mixed at once if possible. In many plants, however, this cannot be done; in such cases the unused material must be kept tightly covered in a cool dry place. While the larger sized containers hold about 700 pounds, at a slight increase in price hypochlorite can be obtained in 350-pound or 100-pound drums, and in many cases the smaller sizes are to be preferred, both because of convenience in handling and to avoid the keeping of large quantities exposed to the atmosphere.

In the mixing of the bleach, the active hypochlorite is dissolved while the inert lime and other insoluble impurities remain. Usually the bleach is thoroughly mixed with a small amount of water into a paste or cream so as to break up the lumps, then more water is added and the whole transferred to the solution tank, and agitated until a thoroughly homogeneous solution is obtained.

As it is very important that the solution be of the same strength throughout, and as this mixing is a laborious process, a power mixer should always be installed except, perhaps, for very small quantities. After all the hypochlorite has been dissolved and the solution once properly stirred up, the strength remains the same throughout the tank.

In some plants the contents of a whole container of bleach are washed out into the solution tank by means, of a stream of water from a hose, and the whole agitated until a thorough solution is obtained. In the mixing, care must be used to get the material thoroughly broken up and agitated so that all the hypochlorite will be dissolved or else a considerable amount of material will be wasted. The writer has known of over fifty per cent waste, due to improper methods of mixing. He has suggested a mixer in the form of a mill or grinder, so that the bleach could be fed through and ground with a stream of water. This he believes would break up lumps and hasten the process.

One should not attempt to dissolve too much hypochlorite in a given amount of water. The solubility of bleach is only about five per cent, and a five per cent solution is difficult to obtain and difficult to handle. It is much better, when possible, to use a weaker solution, say two or three per cent. It is usually better to keep the solution the same strength by mixing the required number of pounds according to the strength of the dry powder, and to vary the dose by changing the feeding device. A rod should be laid off, showing the number of pounds to be used for different depths of water in the tank, from the top down, so that if all of the solution is not run out the rod will show immediately the number of pounds to be used for the amount of water necessary to fill up the tank.”

Commentary: This article was published about six years after the startup of the chloride of lime (calcium hypochlorite) feed system ordered by Dr. John L. Leal and built by George Warren Fuller at Boonton Reservoir—see schematic of Fuller’s chemical feed system below. The description of the chloride of lime feed system for sewage treatment plants (above) is very similar to the one shown below. The article is also quite honest about the many problems with using chloride of lime as a source of chlorine to disinfect water. None of these issues were brought to light during the optimistic testimony given by Leal and the other defendant witnesses at the second Jersey City trial. Over time, chloride of lime feed systems were replaced with pressurized systems feeding chlorine gas from storage tanks of liquid chlorine stored under pressure.

August 19, 1908: Passaic River Pollution Case

1895 Map of Paterson, NJ. Note how the Passaic River practically surrounds the city.

August 19, 1908: Municipal Journal and Engineer article. Stream Pollution Decisions. “In the State of New Jersey an award was recently made by Vice-Chancellor Stevens of the State Court of Chancery in the case of damages claimed to be caused by the pollution of the Passaic river, which introduced some novel methods which may probably be accepted as a precedent in other cases. The city of Paterson discharges sewage into the stream and, the Courts of the State having ruled that riparian owners below the outlets could not claim damages unless the stream received more sewage than it could dilute to an inoffensive condition, no action was taken at first. In time, however, it became evident that a nuisance was being created and complaints to the Paterson Board of Health, to the State Board of Health and to the Legislature having resulted in no abatement of the same, owners of about twenty of the riparian properties, each from 150 to 600 feet deep, brought a suit for injunction to restrain the city from damaging the property owners. The court ruled that an injunction which would prevent the city from using its sewers would work a far greater injury than that being suffered by the property owners, and ordered that instead the city should pay damages in amounts to be settled by a Court of Equity.

Action in such a court was accordingly brought and the city agreed that it would cease polluting the river in the manner complained of within five years from that time. The matter therefore resolved itself into a determination of the amount of damages inflicted upon the owners from the time the damage began until the time promised for its discontinuance. In fixing the first date a large amount of testimony, both expert and otherwise, was taken by the court; but the former, calculated to show what amount of sewage can be discharged into a stream without creating a nuisance, was apparently considered of minor importance by the court. The testimony of the property owners indicated that not until 1892 did the condition of the river have any appreciable influence on the use of the stream for fishing or bathing, but that from then on the evidence of sewage pollution became marked. This date was, accordingly, accepted by the court as that when the damage began, although the plaintiff endeavored to have it made earlier on the ground of the water being rendered unfit for drinking purposes as soon as sewage began to be discharged into it. This last contention was not admitted, however, as there was already such danger from other communities before the Passaic sewers were built.

The fixing of the amount of damages was even more complicated and difficult than determining their duration. The city contested that it was not responsible for contamination due to storm water from the streets, and the court admitted this to a degree only, holding that the city was not responsible for such storm water as flowed over the surface to the river, but was responsible for that discharged thereinto through the sewers. The contention of the city that it should not be held responsible for such injury as would have been done the river by a city of the same size as Paterson, but without sewers, was not admitted by the court. It was also contended that the industrial establishments of the city should stand their proportionate parts of whatever award was made, and although the court appeared to consider the city as responsible for about three-fourths of the total pollution and the industries for one-fourth, it does not appear to either admit or deny this contention, probably leaving this for settlement between such industries and the city.”

Commentary: This case shows the evolution of legal and scientific thought on river pollution after the turn of the 20th century. Note that the concept of dilution was losing favor as the impacts of sewage discharge into a watercourse were becoming better understood. Also it is interesting to note the discussion of stormwater and its impact on surface water quality. I believe that rulings such as this and new laws passed by the states were the defining events that led to an improvement in the water quality of rivers in the U.S. The judge in this case was Frederic W. Stevens who as vice chancellor of the Chancery Court of New Jersey was handling, at the same time, the case between Jersey City and the private water company that built the new water supply at Boonton Reservoir.

Dr. John L. Leal had interests in both cases. For ten years (1890 to 1899), he was the public health officer for Paterson, New Jersey. In his last few annual reports to the mayor, he urged that a solution to the water contamination from Paterson sewage discharges on the Passaic River be pursued. Ultimately, an intercepting sewer was built along the Passaic River, which collected all manner of domestic and industrial waste for discharge into New York Harbor. Eventually, a sewage treatment plant was built to treat the wastes. Leal’s involvement as an expert witness in the Jersey City lawsuit is covered in my book, The Chlorine Revolution.

Reference: McGuire, Michael J. 2013. The Chlorine Revolution: Water Disinfection and the Fight to Save Lives. Denver, CO:American Water Works Association.

July 30, 1982: Surgeon General Koop discusses fluoride; 1894: Jersey City’s Contaminated Water Supply

July 30, 1982: This letter is in response to your request that the Public Health Service (PHS) review the scientific aspects of the epidemiological studies related to the effects of fluoride ingested through drinking water and provide advice on the validity and significance of the findings relative to dental fluorosis.
On July 30, 1982, C. Everett Koop wrote the above paragraph in a letter to John W. Hernandez, Jr., Deputy Administrator at the U.S. Environmental Protection Agency. EPA needed to re-assess and finalize interim drinking water standards set in 1975, shortly after the passage of the Safe Drinking Water Act in 1974. Fluoride was one of many compounds for which the agency needed to set an upper limit for safety. EPA had asked the Public Health Service to weigh in, and Surgeon General Koop was reporting back the findings of a committee his Chief Dental Officer had convened to conduct EPA’s requested review.

Fluoride, like chlorine, is in a unique position in drinking water: having benefits at low levels but adverse effects at higher levels. Public health professionals, and Surgeon Generals in particular, have advocated for adding low levels of fluoride to water in order to prevent tooth decay. Indeed, in his letter to Mr. Hernandez, Surgeon General Koop gave a strong endorsement of fluoridation, “I encourage the dental profession in communities which do not enjoy the benefits of an optimally fluoridated drinking water supply to exercise effective leadership in bringing the concentration to within an optimum level.” More such endorsements from Surgeon Generals can be found in “Is fluoride good for your teeth?” an article at the site Fluoride Exposed, at CDC’s fluoride and fluoridation page here, and at ADA’s fluoridation resources here.
Because we so often associate Surgeon Generals with this kind of promotion of adding fluoride to drinking water, and because we seem to forget that Surgeon Generals have also worked to make sure drinking water does not have too much fluoride in it, this quote in Surgeon General Koop’s letter is particularly interesting:
As one concerned about the total well-being of the individual and one dedicated in helping people avoid impediments to their reaching their maximum potential in society, I cannot condone the use of public water supplies that may cause undesirable cosmetic effects to teeth, just as I cannot condone the use of water supplies below the optimum concentration because of a diminished protection against dental caries.  Therefore, I encourage communities having water supplies with fluoride concentrations of over two times optimum to provide children up to age nine with water of optimum fluoride concentration to minimize the risk of their developing esthetically objectionable dental fluorosis.

The office of the Surgeon General currently works to ensure that Americans do not get too much or too little fluoride in drinking water. The most recent effort was by Surgeon General Vivek Murthy  who reviewed, endorsed, and introduced the Public Health Service’s final decision to lower the recommended level for fluoridation in 2015, from a range of 0.7-1.2 mg/L dependent on regional temperature to a single level (0.7 mg/L) for the entire country.

A copy of the original Koop letter is available here.

Acknowledgement:  Many thanks to Effie Greathouse for providing the excellent narration for this celebration of Dr. Koop’s letter.

July 30, 1894: New York Times Headline. Jersey City’s Foul Water; Sewage-Filled Passaic the Source of Its Supply. “Plenty of Good Drinking Water to be Had and Many Syndicates Ready to Furnish It — None, However, Has Influence Enough to Get a Contract — Tremendous Debt a Serious Obstacle, but Public Health Demands a Change. The people of this city are thoroughly satisfied that they have the worst drinking water to be found anywhere in the United States. This is no sudden conclusion of theirs. It is the result of a steady growth, born of an experience extending over eight or ten years.

When the Passaic River was first tapped as a source of supply, the water was pure. Dr. Chilton of New York and Prof. Horsford of Yale University, who made the analysis, pronounced it better than the water supplied to Philadelphia, New York, or Albany. But that was forty years ago, and the Passaic of 1854 was very different from the river of today.

Then the towns on its banks were merely hamlets. Paterson was only a village and Passaic and Belleville were mere dots on the map. None of them had any sewers to empty into the river, there were no factories along the banks to pollute the waters, and the fluid brought to Jersey City was limpid, clear and sparkling.

Paterson and Passaic are cities now, with extensive sewerage systems, and all the sewage of these two cities, with a population, probably, of 60,000, empties directly into the river. [Sewer Pipe, Water Pipe Death Spiral] In addition, there are many factories, mills, and dye works along the banks of the river, and all the refuse from these goes into the river along with the sewage, to further pollute the water.”

Commentary: The article goes on to catalogue the evils of the lower Passaic River as a source of supply. It would not be until 1899 that a contract was signed with Patrick H. Flynn to develop a new water supply 23 miles west of the city by building a dam on the Rockaway River forming Boonton Reservoir. It was to this water supply that Dr. John L. Leal added chlorine for the first time to disinfect drinking water for consumers. The story forms the basis for my book, The Chlorine Revolution: Water Disinfection and the Fight to Save Lives, which was published in 2013. The Sewer Pipe, Water Pipe Death Spiral was developed for the book and succinctly describes the water contamination problems of the late 19th century.

June 16, 1858: Death of Dr. John Snow

Dr. John Snow

Dr. John Snow (March 15, 1813–June 16, 1858) is famous for the Broad Street Pump episode but he accomplished so much more than that. He was first and foremost a physician who trained in England in the early part of the 19th century. He made significant contributions to the development of anesthesia and he is considered by many to be the Father of Modern Epidemiology.

The story of Dr. John Snow and how he discovered the cause of a cholera epidemic in the Golden Square neighborhood of London in 1854 has reached almost mythical proportions in public health literature.  Three excellent books describe Snow’s life and the details of the Broad Street Pump incident. (Hempel 2007; Johnson 2006; Vinten-Johansen et al. 2003)

Snow was born on March 15, 1813 in the City of York.  He served his medical-apothecary apprenticeship in Newcastle-on-Tyne with later assistantships in the villages of Burnop Field and Pateley Bridge.  In 1836 at the age of 23, Snow moved to London to complete his medical education.  He qualified as a licensed apothecary in 1838 and a surgeon with a London practice in October 1838.  With an office in the parish of Saint Anne-Soho, Snow would have a medical career of only two-dozen years before he was struck down at the age of 45.

At the age of 17, Snow became a vegetarian and soon thereafter committed to only drinking boiled water or, preferably, distilled water as a result of the writings of John Frank Newton.  He embraced abstinence from alcohol around 1836.  Snow was known to be quiet, frugal and energetic, a man of integrity and a surgeon with an indifferent bedside manner.  He refused to dispense pills and other medicines just because his patients wanted them.  He was able to make a living and acquire some success as a physician when he perfected the administration of chloroform as an anesthetic used during surgeries and infant deliveries.  He even delivered two babies while attending Queen Victoria.

He never married.  His solitary existence and his abstinent personal habits allowed him more time than his colleagues to develop his medical practice and enabled him to pursue his intense interest in determining the cause of cholera epidemics.

Snow gave away all of the knowledge he developed.  He made it available for free to any doctor who wanted it.  No attempt was made by him to patent his many devices for dispensing chloroform and ether. As a result, physicians hired him to use his skill with their patients and he became famous for this.

One overriding personal characteristic of this ascetic doctor of the Victorian era was courage.  He worked hard to develop his ideas and used the scientific method and laboratory investigations to establish his case in whatever area he was working.  Once he became convinced of the rightness of his position, nothing could dislodge him.  It was only his tremendous courage that made it possible for him to go up against the establishment and argue that something other than foul air was causing the deadly cholera. (McGuire 2013)

Snow’s determination of the cause of the cholera epidemic near the Broad Street pump and his ability, albeit temporary, to have the pump handle removed is worthy of recounting here.  The 1854 cholera epidemic struck the Golden Square neighborhood of London with particular viciousness. It began on August 31 and started to wind down about September 7, however, many died over the next few days. Well over 500 people died during this epidemic in a small neighborhood. Snow tracked the numbers of deaths in the neighborhood, and it was clear to him from the pattern of death that the Broad Street pump was the center of the affliction and most likely the source of infection. On September 7, Snow convinced the Board of Governors and Directors of the Poor of St. James Parish that the epidemic was being caused by water from the pump. The next day the commissioners ordered that the pump handle be removed. Structural defects in the Broad Street well sump and the cross-connection to the nearby house sewer were not corrected until 1855.

Incredibly, the residents of Broad Street petitioned the Commissioners to reopen the well that had caused hundreds of deaths in their neighborhood.  This was partly due to the official linkage of the severe, isolated epidemic in the Broad Street area to miasma (foul air). In an amazing footnote to history, the commissioners voted 10 to 2 to reopen the well on September 26, 1855, one year and one week after the last deaths during the epidemic.  According to contemporary reports, there was much rejoicing in the street that the Broad Street well was reopened.  The polluted well was not permanently closed until the cholera epidemic of 1866.

With the emphasis on the Broad Street pump episode in most historical accounts, his pioneering work in epidemiology based on cholera occurrence in a district of London served by two water supplies usually gets lost.  Snow was able to demonstrate that homes in areas of London that were being served contaminated water from the tidal portion of the Thames Estuary were far more likely to have cholera deaths than the homes served water from an unpolluted upland source. He believed that dumping sewage into a water supply perpetuated the death spiral caused by cholera and other waterborne diseases. Snow had strong opinions on sewers and drinking water systems.

“Snow who distilled his own drinking water, agreed that London water should be improved, but he considered the abolition of cesspools and the increasing preference for water closets a sanitary disaster…water closets connected to sewer lines that emptied into rivers also used for metropolitan drinking water were, in his mind, primarily an efficient means of recycling the cholera agent through the intestines of victims as rapidly as possible.  Sanitary reforms were needed, but flushing the waste of a town into the same river by which one quenched ones’ thirst seemed sheer stupidity.” (Vinten-Johansen et al 2003)

Dr. John Snow died of a stroke on June 16, 1858, 42 days after the birth of John L. Leal who grew to be a physician who carried on Snow’s concern about the ability of contaminated water to spread disease.  If the discoveries of Dr. John Snow had been accepted and followed by engineers, sewer planners and drinking water providers beginning in 1854, millions of deaths would have been avoided.  Snow was only one person trying to overcome the juggernaut of the miasma theory.  He was far ahead of his time.

References:

Hempel, Sandra. 2007. The Strange Case of the Broad Street Pump: John Snow and the Mystery of Cholera. Los Angeles, Ca.: University of California.

Johnson, Steven. 2006. The Ghost Map: The Story of London’s Most Terrifying Epidemic and How It Changed Science, Cities and the Modern World, New York City, N.Y.: Riverhead Books.

McGuire, Michael J. (2013). The Chlorine Revolution:  Water Disinfection and the Fight to Save Lives. Denver, CO:American Water Works Association.

Vinten-Johansen, Peter, Howard Brody, Nigel Paneth, Stephen Rachman and Michael Rip. 2003. Cholera, Chloroform, and the Science of Medicine. New York City, N.Y.: Oxford University Press.

June 8, 1909: Leal and Fuller Papers Presented at AWWA Conference

Chloride of lime feed system used at Boonton Reservoir

June 8, 1909: John L. Leal, George W. Fuller and George A. Johnson present papers at the AWWA annual conference on this day in Milwaukee, Wisconsin, on the chloride of lime treatment system at Boonton Reservoir, New Jersey. Unlike previous presentations on the addition of disinfection chemicals to water, the three papers were received enthusiastically by the audience. The then President of AWWA, William P. Mason, stated in the discussion section of the papers, “…when I first came in contact with this process I was a very strong disbeliever; in fact, I am on record in print as not approving of the process. I have been converted, however…because of the results of many experiments. I found, very greatly to my surprise, that the dose was exceedingly small that was required to produce satisfactory treatment.” The full story of the chlorination of the Jersey City water supply can be found in The Chlorine Revolution which was published in April 2013.

“Testimony at the second Jersey City trial described the plant facilities in some detail, and later publications gave an overview of the facilities along with selected design details.

Figure 10-1 is a schematic of the chloride of lime feed facility at Boonton. According to Fuller’s testimony, he made only nine engineering design drawings to guide the contractor during construction of the plant. For an equivalent facility today, dozens of drawings would be required.

The chloride of lime facility was housed in a one-story wooden building that was constructed adjacent to the gate house located at the foot of Boonton Dam. In addition to all of the mechanical equipment required to feed chloride of lime, the building housed a small laboratory used to perform simple chemical tests and to conduct bacteriological examinations.

The concentrated chloride of lime powder was put into dissolving tanks along with dilution water from the reservoir (Figure 10-1). Typically, the bleaching powder contained 35 percent available chlorine. A highly concentrated solution of chloride of lime was made in the dissolving tanks and then fed by gravity into the solution tanks. More dilution water was added to the solution tanks to create the desired strength for the chloride of lime mixture. Triplicate pairs of dissolving and solution tanks allowed the operator to produce large batches (about 10,000 gallons each) of 0.5–1 percent dilute solutions.

A belt-driven turbine pump4 (in duplicate) moved the dilute solution up to one of the two orifice tanks. The orifice tanks were positioned at a relatively high elevation, enabling them to feed chlorine solution by gravity into the chamber below. The chamber was downstream of the 48-inch pipelines connecting the outlet tower of the dam to the pipeline delivering water to Jersey City. Duplicate orifice tanks were a critical design factor because chloride of lime in 0.5–1 percent solutions tended to build up solid deposits on the sides of the orifice plate and obstruct the opening.”

Reference: McGuire, Michael J. 2013. The Chlorine Revolution: Water Disinfection and the Fight to Save Lives. Denver, CO:American Water Works Association.

Jersey City Chlorination Facility at Boonton Reservoir

June 3, 1844: Birth of Garret A. Hobart

June 3, 1844: Birth of Garret A. Hobart. “Garret Augustus Hobart (June 3, 1844 – November 21, 1899) was the 24th Vice President of the United States (1897–1899), serving under President William McKinley…. As vice president, Hobart proved a popular figure in Washington and was a close adviser to McKinley.”

While much is known about Hobart’s role as vice president, his role in the formation of private water companies and his support of these companies through legislation is less well known. Hobart was elected to the New Jersey Assembly and Senate during the early part of his career. During the 1870s and 1880s there was a lot of legislative activity that appeared to be for the benefit of private water companies.

In 1881, one bill that was introduced by Garret A. Hobart, then a state senator, was designed to give private water companies the power to acquire and distribute water resources independent of municipal or state control. While not explicitly stated, the bill purportedly had a single intention of giving one company, the Passaic Water Company, more power to access water supplies to prevent water shortages at the factories of Paterson which were forced to idle production in the summer season.

The bill was not successful, (New York Times, March 22, 1881) which was undoubtedly due in part to the widespread suspicion that the bill would grant powers to companies to export New Jersey water supplies to New York. “[New York speculators] have been attracted by the magnificence and extent of New Jersey’s water-shed, and by the sweetness and purity of its waters. Last year’s scheme was said to be intended to enable the tapping of New Jersey’s hills for the New York supply.”(New York Times, March 7, 1881)

Hobart was a resident of Paterson, New Jersey for most of his life. In 1885, Garret A. Hobart joined the Board of the Passaic Water Company and two years later was elected President of the Company. Hobart was described in one source as representing a syndicate of New York capitalists. (Nelson and Shriner 1920) The company had been supplying Paterson and the surrounding area since 1857.

The East Jersey Water Company was formed on August 1, 1889 for the stated purpose of supplying Newark, New Jersey with a safe water supply. All of the men who were shareholders of the new company (including Hobart) were identified with the Lehigh Valley Railroad Company. (New York Times, August 2, 1889) However, the company’s vision extended far beyond a water supply for Newark. The company began as a confidential syndicate composed of businessmen who were interested in executing grand plans for water supply in northern New Jersey and New York City. (Colby and Peck 1900) Nothing came of these grand plans.

Hobart was also a mentor to Dr. John L. Leal of Paterson and encouraged Leal to leave city employment and work full time as the sanitary advisor to several private water companies.(McGuire 2013)

“Hobart died on November 21, 1899 of heart disease at age 55; his place on the Republican ticket in 1900 was taken by New York Governor Theodore Roosevelt.”

References:

Colby, Frank M. and Harry T. Peck eds. The International Year Book—A Compendium of the World’s Progress During the Year 1899. n.p.:Dodd, Mead and Co., 1900.

McGuire, Michael J. 2013. The Chlorine Revolution: Water Disinfection and the Fight to Save Lives. Denver, CO:American Water Works Association.

Nelson, William and Charles A. Shriner. History of Paterson and Its Environs. Vol. 2, New York:Lewis Historical Publishing Company, 1920.

New York Times. “Jersey’s Water Supplies—Senator Hobart’s Bill and Its Effect.” March 7, 1881.

New York Times. “New Jersey’s Law Makers—Mr. Hobart’s Water Bill Killed.” March 22, 1881.

New York Times. “To Give Newark Water.” August 2, 1889.