Metal or Alloy.

(a)

Per

1° C.

(a) Per 1° F.

Platinum Silver (1 pt. Platinum to 2 pts. Silver), hard or annealed.........................

0.031

0.017

German Silver, hard or annealed .................

0.044

0.024

Mercury................

0.072

0.040

Bismuth pressed.................

0.354

0.197

Gold, annealed...............

0.365

0.203

Zinc, pressed..............

0.365

0.203

Tin, " ..............

0.365

0.203

Silver, annealed................

0.377

0.209

Lead, pressed.............

0.387

0.215

Copper, annealed........

0.428

0.238

Iron (about)..................

0.5

0.278