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4 Tolles eyepieces

4 Tolles eyepieces

Robert B. Tolles
1860-1874
35mm Prado slide projector

35mm Prado slide projector

Ernst Leitz (company)
1950-1960
Abbot-type silver disk pyrheliometer

Abbot-type silver disk pyrheliometer

Smithsonian Astrophysical Observatory
1910-1920
Abney reflecting level and clinometer

Abney reflecting level and clinometer

Troughton & Simms
circa 1910
additional wind cup

additional wind cup

Blue Hill Meteorological Observatory
1890-1910
aerial photograph of hut and clearings in rainforest in Rio Parima

aerial photograph of hut and clearings in rainforest in Rio Parima

Institute of Geographical Exploration
1920-1940
aerial photograph of Lower Manhattan

aerial photograph of Lower Manhattan

Institute of Geographical Exploration
1910-1935
aerial photograph of Mount Vernon

aerial photograph of Mount Vernon

Institute of Geographical Exploration
1920-1940
aerial photograph of Mount Vernon (close-up)

aerial photograph of Mount Vernon (close-up)

Blue Hill Meteorological Observatory
1912-1940
aerial photograph of Niagara Falls

aerial photograph of Niagara Falls

Institute of Geographical Exploration
1920-1940
aerial photograph of Rio de Janeiro

aerial photograph of Rio de Janeiro

Institute of Geographical Exploration
1920-1940
aerial photograph of Rushville, Indiana

aerial photograph of Rushville, Indiana

Institute of Geographical Exploration
1920-1940
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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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