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Degrees of heat above zero at which substances melt:—Wrought iron, 3,980 degrees; cast iron, 3,479; platinum, 3,080; gold, 2,590; copper, 2,548; steel, 2,500; glass, 2,377; brass, 1,900; silver, 1,250; antimony, 951; zinc, 740; lead, 594; tin, 421; arsenic, 365; sulphur, 226; beeswax, 151; gutta percha, 145; tallow, 97; lard, 95; pitch, 91; ice, 33. Degrees of heat above zero at which substances boil:—Ether, 98 degrees; alcohol, 173; water, 212; petroleum, 306; linseed oil, 640; blood heat, 98; eggs hatch, 104.