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1-1-10 ampere shunt

Weston Electrical Instrument Corporation

late 19th-early 20th Century

1.875 x 2.25 inch rock salt prism in sealed tube

John A. Brashear

1916

1amp shunt

Weston Electrical Instrument Corporation

circa 1912

$2.25-inch refracting telescope$

2.25-inch refracting telescope

Optisches Institut von Dr. Steeg & Reuter

circa 1880

3 polished quartz plates

American

1900-1925

5 amp shunt

Weston Electrical Instrument Corporation

circa 1912

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

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

Jefferson Physical Laboratory, Harvard University

1925-1940

10 amp shunt

Weston Electrical Instrument Corporation

circa 1912

60° fused quartz prism

Theodore Lyman IV

circa 1920

60° quartz prism

German

1912

100 amp shunt

Weston Electrical Instrument Corporation

circa 1912

120° prism half-polished

American

circa 1900

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1-1-10 ampere shunt

1.875 x 2.25 inch rock salt prism in sealed tube

1amp shunt

2.25-inch refracting telescope

3 polished quartz plates

5 amp shunt

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

10 amp shunt

60° fused quartz prism

60° quartz prism

100 amp shunt

120° prism half-polished