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/ 13
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
100g of yttrium dust in sealed glass tube

100g of yttrium dust in sealed glass tube

Percy Williams Bridgman
circa 1925
Acme Acmeflex S 5-tube kit radio receiver

Acme Acmeflex S 5-tube kit radio receiver

ACME Apparatus Company
1925-1926
ACME B power supply type E 3

ACME B power supply type E 3

ACME Apparatus Company
circa 1925
ACME choke coil

ACME choke coil

ACME Apparatus Company
1920-1929
Acme CW Unit transformer

Acme CW Unit transformer

ACME Apparatus Company
circa 1922
Acme mounted rectifier, oscillator, and vacuum tube for teaching

Acme mounted rectifier, oscillator, and vacuum tube for teaching

ACME Apparatus Company
circa 1920
ACME Reflex Acmefone radio receiver

ACME Reflex Acmefone radio receiver

ACME Apparatus Company
1923
ACME Reproducer Double Free Edge Cone type K-1A loudspeaker

ACME Reproducer Double Free Edge Cone type K-1A loudspeaker

ACME Apparatus Company
circa 1927
Acme Reproducer Double Free Edge Cone type K-1 loudspeaker

Acme Reproducer Double Free Edge Cone type K-1 loudspeaker

ACME Apparatus Company
1926-1927
Acme Reproducer Single Free Edge Cone type K-3 loudspeaker

Acme Reproducer Single Free Edge Cone type K-3 loudspeaker

ACME Apparatus Company
1926-1927
Acme type Y-1 vacuum tube radio detector

Acme type Y-1 vacuum tube radio detector

ACME Apparatus Company
1920
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