Peter Peterson, brother of Lewis Peterson, encloses a check for James Curtis Booth (1810-1888) to pay for the water-sample analysis Booth completed.

Lewis Peterson responding to his October 6th letter to James Curtis Booth (1810-1888), granting Booth permission to publish his analysis of Peterson's water sample.

Lewis Peterson requests an analyses of water and salt samples from James Curtis Booth (1810-1888).

Volume is a survey of studies for the improvement of steam power plant efficiencies from the perspective of applied chemistry. Describes the analyses and tests necessary for various materials used in the powerhouse.…

Procedures for a series of tests used in water analysis. The experiments include the determination of various minerals and contaminants present in water samples such as nitrite, sulfates, iron, etc. Each contains a list…

Kathryn C. Hach-Darrow begins the interview with anecdotes of Clifford C. Hach as a young, inquisitive child growing up on a farm and the effects of the Great Depression on the Hach family. Despite financial…

General view of Dearborn Chemical Company employee E.P. Fager comparing the color of two solutions during a water sample field test. Assorted glassware and a Dearborn portable testing cabinet are visible on the table.…

General view of employees (left to right) Ray Shoan, Charles S. White, Andrew Lombardi, and Bernard Tarley conducting water analysis tests at the Dearborn Chemical Company's 35th Street laboratory and manufacturing…

General view of employee E.L. Konigsmark recording water samples sent to the Dearborn Chemical Company's 35th Street Laboratory facility and manufacturing plant for analysis. Founded in 1887, the Dearborn Chemical…

General view of employee Al Slisg conducting a water analysis test at the Dearborn Chemical Company's 35th Street laboratory and manufacturing facility located in Chicago, Illinois. Founded in 1887, the Dearborn…

General view of several employees conducting water analysis tests at the Dearborn Chemical Company's 35th Street laboratory and manufacturing facility located in Chicago, Illinois. The three employees visible in the…

General view of assorted water samples sent to the Dearborn Chemical Company's 35th Street Laboratory for analysis. Founded in 1887, the Dearborn Chemical Company was a corporate ancestor of BetzDearborn, Incorporated…

General view of assorted water samples sent to the Dearborn Chemical Company's 35th Street Laboratory for analysis. Founded in 1887, the Dearborn Chemical Company was a corporate ancestor of BetzDearborn, Incorporated…

General view of Dearborn Chemical Company employee C.B. Smith utilizing a concentration hydrometer during a water sample field test. Assorted glassware and a Dearborn portable testing cabinet are also visible on the…

General view of two unidentified men utilizing a Dearborn Chemical Company portable testing cabinet to conduct a water sample field test. Founded in 1887, the Dearborn Chemical Company was a corporate ancestor of…

General view of Dearborn Chemical Company engineer F.B. Horstmann utilizing a portable testing cabinet to conduct a water sample field test. A stamp on the verso of the photograph for "The Fensholt Company," a public…

General view of Dearborn Chemical Company employee E.P. Fager preparing a water sample for testing. A stamp on the verso of the photograph for "The Fensholt Company," a public relations firm based in Chicago, suggests…

General view of Dearborn Chemical Company representative C.M. Kesler (seated) and hospital employee "Mike" examining a sample of water at Mary's Help Hospital (now Seton Medical Center) in San Francisco, California. Per…

General view of an unidentified employee preparing a water sample for testing at a Dearborn Chemical Company's laboratory facility in Chicago, Illinois. A stamp on the verso of the photograph for "The Fensholt Company,"…

Robert E. Finnigan begins the interview with a description of his family and childhood years in Snyder, New York. Finnigan developed an interest in military service and science while reading The Dave Darrin Series about…

Thank-you letter from First Lady Eleanor Roosevelt to Betz Laboratories for fabricating water identical to that found in London, which was then delivered to the White House and used for the tea served to the King and…

Letter from First Lady Eleanor Roosevelt to Edwin M. Ross in which Roosevelt accepts Ross's offer to analyze and duplicate London city water which would be used to serve tea to the King and Queen of England.

Telegram from Henrietta Nesbitt (1874-1963), White House cook and housekeeper, to W.H. and L.D. Betz asking for an additional twenty gallons of the specially fabricated London city water to be delivered to the White…

Letter from Malvina C. Thompson (secretary to First Lady Eleanor Roosevelt) to Edwin M. Ross instructing him that the samples of water fabricated by Betz Laboratories to duplicate London City water has arrived. Mrs.…

Illustrated plate depicting miscellaneous forms of microscopic and minute organisms living in water.