Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 970
The knives are represented in the drawings as being straight; but where the gutta percha to be cuthappens to be of a more than usually hard or intractable quality, it is advantageous to substitute knivesof a curved or reaping-hook form, on account of their more gradual mode of action. Fig. 2239 is…
Mechanical engineering
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