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1-foot Cassegrain reflecting telescope

1-foot Cassegrain reflecting telescope

James Short
circa 1758
1-foot Gregorian reflecting telescope

1-foot Gregorian reflecting telescope

Benjamin Martin
1761
2-foot Gregorian reflecting telescope with split object glass micrometer

2-foot Gregorian reflecting telescope with split object glass micrometer

James Short
circa 1763
4-foot Gregorian reflecting telescope

4-foot Gregorian reflecting telescope

James Short
circa 1767
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

John Poole
1855-1881
56-hour marine chronometer

56-hour marine chronometer

Charles Frodsham
circa 1865
astronomical quadrant with achromatic sights

astronomical quadrant with achromatic sights

Jeremiah Sisson
1765
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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