Rare Books
Heat power
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Power plant and heating
Manuscripts
Approx. 40 items: letters, forms and legal documents related to construction of new (fourth) Times building. Lohman Bros. was a principal contractor for plumbing and heating equipment and installation.
mssLAT
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Patents for electric heating devices : 1920-1922
Manuscripts
Two expired U.S. patents issued to Earl H. Richardson and the Edison Electric Appliance Company for electronic heating devices. Each includes a patent certificate as well as printed applications with descriptions and diagrams of the heating devices.
mssHM 74751-74752