American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 120
ping further back, and thereby deter-mines the succeeding position of the chisel.The chisel, having been placed in its secondposition, is again struck with the hammer,each blow, by practice, being given with the AMERICAN HOKOLOGICAL JOUENAL. Ill same force. The drawing gives an enlargedview of the… … Before being hardened, the files are drawnthrough beer grounds, yeast, or some ad-hesive fluids, and then through common saltmixed with pounded hoof; the object of whichis to protect the teeth from direct action of thefire and oxidation by the air ; the fusion ofthe salt affording an index when the…
Clocks and watches
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