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1.875 x 2.25 inch rock salt prism in sealed tube

John A. Brashear

1916

$2.25-inch refracting telescope$

2.25-inch refracting telescope

Optisches Institut von Dr. Steeg & Reuter

circa 1880

2 rolls of film for Kodak No. 2 Brownie camera

Eastman Kodak Company

circa 1910

3 polished quartz plates

American

1900-1925

$9 lantern slides of diffraction patterns, atomic structure, spectra.$

9 lantern slides of diffraction patterns, atomic structure, spectra.

Jefferson Physical Laboratory, Harvard University

1925-1940

60° fused quartz prism

Theodore Lyman IV

circa 1920

60° quartz prism

German

1912

120° prism half-polished

American

circa 1900

adjustable prism for large spectrograph

American

1920-1940

adjustable prism for large spectrograph

American

1920-1940

Beckmann thermometer

American

1890-1910

Image Not Available

blueprint of alignment and trimming of Fairchild T-3A aerial photographs

Institute of Geographical Exploration

1933

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1.875 x 2.25 inch rock salt prism in sealed tube

2.25-inch refracting telescope

2 rolls of film for Kodak No. 2 Brownie camera

3 polished quartz plates

9 lantern slides of diffraction patterns, atomic structure, spectra.

60° fused quartz prism

60° quartz prism

120° prism half-polished

adjustable prism for large spectrograph

adjustable prism for large spectrograph

Beckmann thermometer

blueprint of alignment and trimming of Fairchild T-3A aerial photographs