Tin

A metal; one of the elements; symbol, Sn; atomic weight, 117.8; equivalent, 58.9 and 29.5; valency, 2 and 4; specific gravity, 7.3. It is a conductor of electricity.   Relative resistance, compre ed, (Silver = 1)   8.784   Specific resistance at 0° C. (32° F.), 13.21   microhms.   Resistance of a wire at 0° C. (32° F.),   (a) 1 foot long, weighing 1 grain,       1.380   ohms.   (b) 1 foot long, 1/1000 inch thick, 79.47     "   (c) 1 meter long, weighing 1 gram,       .9632   "   (d) 1 meter long, 1 millimeter thick, .1682   "   Resistance of a 1 inch cube at 0° C. (32° F.),   5.202   microhms.   Percentage of variation in resistance     per degree C. (1.8° F.), at about 20° C. (68° F.), .0365   Electro-chemical equivalent (hydrogen =.0105), .619   mgs. .310   " 542   STANDARD ELECTRICAL DICTIONARY.