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Scientific American, Vol. 46, No. 2 (January 1882) (1882)

leaf 8

An illustration from Scientific American, Vol. 46, No. 2 (January 1882), 1882, leaf 8
ink, one part of gum arabic, and sixty-four The engraving shows an improved T-square, the blade of White, of Wakefield, Va., consists in a rod provided with parts of water. The platinum imparts to the writing the which can be adjusted to any desired angle by a simple a straight part, having a… … forty to forty-five feet deep, and runs in the main channel opposite sides of their upper ends are bolted the lower ends with a current between four and five miles an hour. Many HOERMANN'S T-SQUARE. of two uprights. Fence panels are then placed upon the of the timbers of the trestle are over sixty…

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