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3 diffraction color photographs, slit, color photograph on lantern slides

3 diffraction color photographs, slit, color photograph on lantern slides

American
circa 1906
Abbe refractometer, Zeiss Model I

Abbe refractometer, Zeiss Model I

Carl Zeiss Jena
circa 1915
air pump

air pump

E. S. Ritchie & Sons
1870-1890
air pump base

air pump base

E. S. Ritchie & Sons
1870-1890
air pump vacuum plate

air pump vacuum plate

E. S. Ritchie & Sons
1870-1890
AMRAD type 2611 variometer

AMRAD type 2611 variometer

American Radio and Research Corporation
circa 1921
apothecary's balance

apothecary's balance

American
mid 19th Century
apparatus to show expansion of metal upon heating

apparatus to show expansion of metal upon heating

American
1870-1900
Archimedean water screw demonstration

Archimedean water screw demonstration

American
1880-1940
audio oscillator teaching model

audio oscillator teaching model

Department of Physics, Bowdoin College
after 1950
audio oscillator teaching model

audio oscillator teaching model

Department of Physics, Bowdoin College
after 1950
azimuth circle for a mariner's compass

azimuth circle for a mariner's compass

E. S. Ritchie & Sons
1919
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