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1930-1949

Pickup Forage Harvester
Society: ASABEMain Category: Agricultural & BiologicalSub Category: Equipment, Harvesting and BalingEra: 1930-1949DateCreated: 1931Agricultural Engineering Laboratory, University of WisconsinMadisonState: WIZip: 53911Country: USAWebsite: https://www.asabe.org/awards-landmarks/asabe-historic-landmarks/forage-harvester-22.aspxCreator: Saiberlich, Erwin W.

William J. Conroy Of Aylmer, Quebec, Received Patent No. 465,127 On The First Field Hay Chopper On 15 December, 1891. Its Sickle Cut The Crop, Which Was Elevated Directly Into A Cylindrical Curved-Bar Cutterhead. It Was Not Commercially Successful, But It Recognized The Need.

Professor Floyd Waldo Duffee, Agricultural Engineering Department, University Of Wisconsin, Built And Field Tested A Silo Filler With An Attached Hay Loader In 1926. He Presented The Specifications Of A Complete Unified Harvester To The National Asabe Meeting In 1927.

YearAdded:
1988
Image Credit: Courtesy Flickr/Bob Adams (CC BY-SA 2.0)Image Caption: Claas Jaguar 870 forage harvester with pickup header
Grain Aeration
Society: ASABEMain Category: Agricultural & BiologicalSub Category: StorageEra: 1930-1949DateCreated: 1931Sukup HallAmesState: IAZip: 50011Country: USAWebsite: https://www.asabe.org/awards-landmarks/asabe-historic-landmarks/grain-aeration-39.aspxCreator: Fenton, F. L.

Tests Of Grain Aeration To Cool And Dry Combine-Harvested Wheat By F. L. Fenton, C. O. Swanson, And Orval C. French At Kansas State University In 1930-31 Showed Mechanical Ventilation To Be More Effective Than Natural Draft Ventilation. Mechanical Aeration Was Further Developed In The 1940's To Prevent Moisture Migration, Which Caused Wetting And Spoilage Of The Top Layers Of Stored Grain. Studies In 1944-45 By Usda Agricultural Engineers G. W. French And W. V. Hukill Cooperating With Iowa State University Proved That Mechanical Aeration Prevented Moisture Migration. G. H.

YearAdded:
2001
San Antonio River Walk & Flood Control System
Society: ASCEMain Category: CivilSub Category: Water Supply & ControlEra: 1930-1949DateCreated: 1929-1941San AntonioState: TXZip: 78205Country: USAWebsite: http://www.asce.org/Project/San-Antonio-River-Walk---Flood-Control-System/Creator: Hugman, Robert H.H., Arneson, Edward P.

San Antonio's River Walk, a catalyst for abundant commercial and tourism enterprise, is generally regarded by cities and urban planners throughout the world as a prototype for the development of urban riverfront sites. The River Walk's success, however, would not have been possible without a series of flood-control and architecture projects completed in the first half of the 20th century that relied heavily on civil-engineering expertise. 

YearAdded:
1996
Image Credit: Courtesy Flickr/Tim Pearce (CC BY 2.0) Image Caption: San antonio texas river walk 2011 riverwalkEra_date_from: 1929
The Beckman pH Meter
Society: ACSMain Category: ChemicalSub Category: New ProductsEra: 1930-1949DateCreated: 1936Beckman InstitutePasadenaCountry: USAWebsite: https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/beckman.html, https://www.acs.org/content/dam/acsorg/education/whatischemistry/landmarks/beckman/beckman-ph-meter-commemorative-booklet.pdfCreator: 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:

YearAdded:
2004
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
Russell Marker and the Mexican Steroid Hormone Industry
Society: ACSMain Category: ChemicalSub Category: MedicalEra: 1930-1949DateCreated: 1938–1945Pond LaboratoryUniversity ParkState: PACountry: USAWebsite: https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/progesteronesynthesis.htmlCreator: Russell Marker

Steroid chemists often refer to the 1930s as the Decade of the Sex Hormones, when the molecular structures of certain sex hormones were determined and first introduced to medical practice as drugs. Russell Marker achieved the first practical synthesis of the pregnancy hormone, progesterone, by what now is known as the "Marker Degradation." Produced from starting material in a species of Mexican yam, Marker’s progesterone eventually became the preferred precursor in the industrial preparation of the anti-inflammatory drug cortisone.

YearAdded:
1999
Image Caption: Marker DegradationEra_date_from: 1938–1945
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