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The Mystery Radio!--Dr. Riggs granted 40 patents on revolutionary set based on entirely new principles. New York: Left, Donald F. Hastings, assistant to Dr. Riggs, discussing the amplifier with the inventor. This amplifier is but 5 inches wide by 3 inches high, yet it will fill the largest autidorium with music, it is asserted. Two of the revolutionary tubes are shown on top of the amplifier. The box contains a complete outfit for operting a set from house current. The set can operate on either A.C. or D.C. with identical quality and volume. 1796 photonegative

view The Mystery Radio!--Dr. Riggs granted 40 patents on revolutionary set based on entirely new principles. New York: Left, Donald F. Hastings, assistant to Dr. Riggs, discussing the amplifier with the inventor. This amplifier is but 5 inches wide by 3 inches high, yet it will fill the largest autidorium with music, it is asserted. Two of the revolutionary tubes are shown on top of the amplifier. The box contains a complete outfit for operting a set from house current. The set can operate on either A.C. or D.C. with identical quality and volume. 1796 photonegative digital asset number 1
Publisher:
Underwood & Underwood
Subject:
Hastings, Donald F
Physical description:
Silver gelatin on glass
1 item, 4" x 5"
Type:
Photographs
Place:
New York (N.Y.)
Riggs, Dr
Date:
1900-1910
Notes:
Currently stored in box 3.1.70 [227A]
Topic:
Radios
Research facilities
Scientists
Local number:
RSN 18260
See more items in:
Underwood & Underwood Glass Stereograph Collection 1895-1921
Data Source:
Archives Center - NMAH

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