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Gas x-ray tube with heavy anti-cathode

1911-1932

Specimens illustrating the Woodruff keying system

1887-1892

15" Pratt and Whitney precision hand level

1923
Audiograph dictation machine by The Gray Manufacturing Co, Hartford, Conn, U.S.A. c. 1958.

Audiograph dictation machine by the Gray Manufacturing Co, c.1958

1958
Edition of 'The Connecticut Courant' published Saturday October 20th 1849. Features two advertisements for daguerreotype studios.

Edition of 'The Connecticut Courant', published 1849

1849-10-20