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Society: ACSMain Category: ChemicalEra: 1930sDateCreated: 1936Day-Glo Color Corp.ClevelandState: OHCountry: USAWebsite: Switzer, Robert and Joseph

DayGlo fluorescent pigments, a new class of pigments based on fluorescent dyes and polymeric materials, were developed between the 1930s and 1950s by scientists at Switzer Brothers, Inc. (now Day-Glo Color Corp.). These pigments absorb various light frequencies (visible and invisible to the human eye) and reemit them, producing intense visible colors that appear to glow, even in daylight.

Image Caption: Signs are one common use for DayGlo fluorescent pigments.
Dr. Albert Szent-Györgyi
Society: ACSMain Category: ChemicalEra: 1930sDateCreated: 1936University of Szeged Albert Szent-Györgyi Medical FacultySzegedWebsite: Szent-Györgyi, Dr. Albert

Albert Szent-Györgyi (1893-1986), biochemist, pioneered the study of biological oxidation mechanisms during the 1920s. Between 1930 and 1936, while a Professor at Szeged University, he proved that hexuronic acid, which he had previously isolated, is identical with vitamin C and that it could be extracted in kilogram quantities from paprika.

Image Credit: Von FOTO:FORTEPAN / Semmelweis Egyetem Levéltára, CC BY-SA 3.0, Caption: Dr. Albert Szent-Györgyi circa 1948.
Triborough Bridge Project
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1930-1939DateCreated: 1936Robert F. Kennedy BridgeNew YorkState: NYZip: 10035Country: USAWebsite: Moses, Robert , Ammann, Othmar

The Triborough Bridge Project is a three-branched waterway crossing that connects Manhattan, the Bronx, and Queens at a junction of the East River and the Harlem River in New York City. The complex structure includes a suspension bridge from Wards Island to Queens, a vertical lift span from Randall's Island to Manhattan, a fixed span (designed to be convertible to a lift span) across the Bronx Kills, viaducts, and an innovative three-legged roadway interchange.

Image Credit: Public Domain (National Park Service)Image Caption: Triborough Bridge ProjectEra_date_from: 1936
Norris Dam
Society: ASCEMain Category: CivilSub Category: DamsEra: 1930-1939DateCreated: 1936Norris DamKnoxvilleState: TNZip: 37705Country: USAWebsite: Wank, Roland

Norris Dam impounds the Clinch River, a mountain tributary of the Tennessee River. The facility stands as a tribute and symbol of the birth of the Tennessee Valley Authority (TVA). Given broad jurisdiction over resource development in the watershed (a 40,000-square-mile basin comprising parts of Virginia, North Carolina, Georgia, Alabama, Mississippi, Kentucky, and Tennessee), the TVA was formed to plan for flood control, improve navigation, and produce hydroelectric power.

Image Credit: Courtesy Flickr/vosburg09 (CC BY 2.0)Image Caption: Norris DamEra_date_from: 1936
Kavanagh Building
Society: ASCEMain Category: CivilSub Category: BuildingsEra: 1930-1939DateCreated: 1936Kavanagh BldgBuenos AiresCountry: ArgentinaWebsite: Sánchez, Gregorio , Lagos, Ernesto

Built during the 1930s, when Argentina's economy was the tenth strongest in the world, the Kavanagh Building was one of the world's first reinforced concrete skyscrapers and for many years remained the tallest building in South America. Commissioned by Corina Kavanagh and designed by architect Sanchez Lago y De la Torre, the 31-story modernist structure juxtaposes five volumes in a triangular, stair-like configuration that served for many years as a representative symbol of modern Buenos Aires.

Image Credit: Courtesy Flickr/Alex Proimos (CC BY 2.0)Image Caption: Kavanagh BuildingEra_date_from: 1936
The Beckman pH Meter
Society: ACSMain Category: ChemicalSub Category: New ProductsEra: 1930-1949DateCreated: 1936Beckman InstitutePasadenaCountry: USAWebsite:, Beckman, Arnold

When Arnold Beckman, a professor of analytical chemistry at the California Institute of Technology, was asked to devise a way to measure acidity in citrus fruit, the resulting “acidometer” revolutionized chemical instrumentation. The innovative features of the pH meter, including its use of integrated electronic technology and all-in-one design, were the basis for subsequent modern instrumentation developed by Beckman and his company.


The plaque commemorating the development reads:

Image Credit: Courtesy Science History InstituteImage Caption: Chemist George Garcelon using a portable Beckman pH meter in laboratory, 1951. Interior of Research Laboratory, Althouse Chemical Plant, 500 Pear Street, Reading, PennsylvaniaEra_date_from: 1936
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