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Scientific American, Vol. 58, No. 3 (1888) (1888)

leaf 4

An illustration from Scientific American, Vol. 58, No. 3 (1888), 1888, leaf 4
is allowed to slowly drop on it, it first be- may be twelve times its size, a stud or pin on the face r+ oe AN IMPROVED CAR-AXLE BOX. comes very white and chalky, and then gradually, per- of the spur gear wheel, as it comes round in a given fectly transparent. This property is developed so A… … by a single workman may be greatly increased without CLOCK ALARM. increase of work is illustrated herewith, and has been patented by Mr. Edgar Aber, of Troup, Texas. The space of time, striking an approximately upright lever, at the same time save packing, has been patented by main frame is made up…

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