Abbott's American Watchmaker and Jeweler

How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.

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Ductility

Tena city.(Number of lbs, sustained by c.787 of a line in diameter in wires of the various metals.) Fahrenheit Centig'de Platinum..... 21.40 to 21.50 Infusible except by the Oxyhydrogen blow-pipe. 6 3 274 Gold..... 19.25 to 19.50 2016 deg. 1102 deg. 1 1 150 1/2 Mercury..... 13.56 to 13.59 Lead..... 11.40 to 11.45 612 deg. 322 deg. 7 9 27 1/2 Silver..... 10.47 to 10.50 1873 deg. 1023 deg. 2 2 187 Bismuth..... 9.82 to 9.90 497 deg. 258 deg. Copper..... 8.89 to 8.96 1994 deg. 1090 deg. 3 5 302 Nickel..... 8.40 to 8.60 2700 deg. 1482 deg. 10 10 Iron..... 7.77 to 7.80 2786 deg. 1530 deg. 9 4 549 Tin..... 7.25 to 7.30 442 deg. 228 deg. 5 8 34 1/2 Zinc..... 6.80 to 7.20 773 deg. 412 deg. 8 7 109 1/2 Antimony..... 6.75 to 6.80 A little below red heat. Arsenic..... 5.70 to 5.90 Volatilizes below fusing. Aluminum..... 2.56 to 2.60 1300 deg. 705 deg. 4 6 300

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