Lead

A metal; one of the elements; symbol Pb. Atomic weight, 207; equivalent, 103-1/2; valency, 2. Lead may also be a tetrad, when its equivalent is 51.75. The following data are at 0º C. (32º F.) with compre ed metal: Relative Resistance, (Silver = l)     13.05 Specific Resistance, 19.63   microhms. Resistance of a wire, (a) 1 ft. long, weighing 1 grain, 3.200   ohms. (b) 1 meter long, weighing 1 gram, 2.232  " (c) 1 meter long, 1 millimeter thick,   .2498  " Resistance of 1 inch cube, 7.728   microhms. Electro-Chemical Equivalent (Hydrogen =.0105) 1.086   mgs.