nto sockets on provided by the recent invention of Mr. Rudolph A. handle. A valve located at the base of the handle is the opposite side. This construction relieves the side Steeb, of Roselle, N. J. The pump is provided with provided with a thumb piece, which by means of a two cylinders, one of… … from the cylinder in the PRODUCING THE VACUUM IN ELECTRIC LAMP BULBS. opposite direction, terminat- A NOVEL PICTURE EXHIBITOR. ing in a coupling F. The coupling connects with the In order to prevent rain and moisture from enter- We illustrate herewith a toy picture exhibitor for tube extending…
Patents · Spark · Radium · Feet · Speed · Power · Horse power · Motor · Loch long · Loch lomond · Scientific American · Sir william · Average speed · Radium salt · Spark terminals · Liquid air · Candle power
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