लॉग इन करा
Writing letters with orange retro vintage typewriter
CIRCA 1970s - Shots from the 1972 Presidential Primaries.
CIRCA 1970s - Shots from the 1972 Presidential Primaries.
United States CIRCA 1940s: Boy watches pressure meter rise to one volt. Boy writes down Volt - Pressure. Boy flips through book.
United States CIRCA 1940s: Illustration of Andre Ampere, French physicist. Boy speaks to Ampere in the book.
United States CIRCA 1940s: Teen boy sits at kitchen table with dry cell batteries. Train moves down truck. Boy puts down lightbulb on truck.
1940s: Kitchen. Young man picks up light bulb. Hand turns page to portrait of man.

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3421721769
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स्टॉक व्हिडिओ ID: 3421721769

United States CIRCA 1940s: Teen boy writes with pencil: Amp = three volts over six ohms. .5 Boy picks up lightbulb. Printed text on lightbulb: Sylvania, 100 watt, 120 v.

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