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A New Device for Locating Hidden Pipes

Description: Reprinted article describing a device that detects buried or hidden pipes based on magnetic deflection, by reducing the control effects of the earth's magnetic field. It includes photographs of the device and its use, as well as data graphs. Some text is underlined in red and blue, and there is a pencil sketch at the very end.
Date: 1935
Creator: Hoare, S. C.
Partner: Private Collection of Mike Cochran

American Marsh Type PF-1 Centrifugal Fire Pumps, Gasoline Engine Driven

Description: Pamphlet advertising American-Marsh portable PF-1 water pump for firefighting. It includes information about the use of the pump, various specifications and maintenance requirements, and brief descriptions of other pumps sold by the company. There are handwritten notes in green ink on the inside pages.
Date: March 27, 1937
Creator: American Steam Pump Company
Partner: Private Collection of Mike Cochran

[Advertising Flyer for Model B Typhoon Super-Charger]

Description: Pamphlet advertising a mechanism that can be installed in cars to "super charge" their performance by affecting the flow of air into the carburetor. It includes information about how it works, why it is economical, and images of testimonial letters.
Date: 1935~
Creator: Typhoon Manufacturing Company
Partner: Private Collection of Mike Cochran
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