Modern Electrics and Mechanics

Modern Electrics and Mechanics

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A NOVEL WATCH A very novel and convenient watch may be made by removing the hands of an inexpensive watch and replacing them with two aluminum discs ... When the minutes are greater than 30, read the hour to the right of the line scratched on the crystal. ... 0SAp HOME MADE OXYGEN CARBON REMOVER It is my.

Title:Modern Electrics and Mechanics
Publisher: - 1914


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