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1-foot Cassegrain reflecting telescope

1-foot Cassegrain reflecting telescope

James Short
circa 1758
2-foot Gregorian reflecting telescope with split object glass micrometer

2-foot Gregorian reflecting telescope with split object glass micrometer

James Short
circa 1763
8-day marine chronometer

8-day marine chronometer

Charles Frodsham & Company, Ltd
circa 1900
48-hour marine chronometer

48-hour marine chronometer

Arnold & Dent
1830-1840
56-hour marine chronometer

56-hour marine chronometer

William Bond and Son
circa 1860
56-hour marine chronometer

56-hour marine chronometer

John Bliss & Company
circa 1880
56-hour marine chronometer

56-hour marine chronometer

Charles Frodsham
circa 1865
56-hour marine chronometer

56-hour marine chronometer

John Poole
1855-1881
astronomical quadrant with achromatic sights

astronomical quadrant with achromatic sights

Jeremiah Sisson
1765
astronomical regulator

astronomical regulator

Thomas Tompion
circa 1685
astronomical regulator

astronomical regulator

Simon Willard, Jr.
1832
astronomical regulator

astronomical regulator

Benjamin Franklin Willard
1844
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The Collection of Historical Scientific Instruments
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p. 617-495-2779 • f. 617-496-5794
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