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Gas x-ray tube with heavy anti-cathode

1911-1932

15" Pratt and Whitney precision hand level

1923

Specimens illustrating the Woodruff keying system

1887-1892
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
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