The machinist and tool maker's instructor, containing an easy method of calculating and laying out difficult work in the machine shop .. (1896)
Genung, Edward. [from old catalog] · New York [Press of J. B. Savage, Cleveland] · leaf 28
icular size and shape forged in theblacksmith shop and not having anything on hand of thatparticular shape, we have to take something smaller, larger,or, the shape may be quite different. It sometimes happensthat we want a square block forged and we have to take apiece of round material to make it.… … too large, etc. Figure 5is a block, we will say ofsteel, as shown, 5//squareand 3 thick, and, asshown before, the sur-face measure would bethus, 257/ this would be the3 number of square^7 inches, on the endonly, and if it isthree inches deep or thick, we multiply this by three inches^)giving 75.…
Machinery
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