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2 laboratory end supports for holding a single horizontal rod

2 laboratory end supports for holding a single horizontal rod

Central Scientific Company
1900-1925
2-mirror 36° kaleidoscope

2-mirror 36° kaleidoscope

Charles G. Bush
circa 1873
3 laboratory end supports for holding a single horizontal rod

3 laboratory end supports for holding a single horizontal rod

Central Scientific Company
1900-1925
6-inch flint-glass telescope lens

6-inch flint-glass telescope lens

American
1880-1920
10-inch celestial globe

10-inch celestial globe

C. Smith & Son
1825-1850
60° fused quartz prism

60° fused quartz prism

Theodore Lyman IV
circa 1920
ACME Reflex Acmefone radio receiver

ACME Reflex Acmefone radio receiver

ACME Apparatus Company
1923
Acme type Y-1 vacuum tube radio detector

Acme type Y-1 vacuum tube radio detector

ACME Apparatus Company
1920
aircraft recording bubble sextant, A-10

aircraft recording bubble sextant, A-10

Fairchild Camera and Instrument Corporation
circa 1940
alternating current motor demonstration (?)

alternating current motor demonstration (?)

Central Scientific Company
ca. 1910-1940
AMRAD type 2797 grounded short gap with original box

AMRAD type 2797 grounded short gap with original box

American Radio and Research Corporation
AMRAD type D-1 medium wave coupler

AMRAD type D-1 medium wave coupler

American Radio and Research Corporation
1921
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