Cast iron contains high levels of carbon ... craftsmen to construct sturdier bridges and higher buildings. Adding alloys to steel yield higher strength, more wear-resistant metals.

Such are the general conditions which should be followed in making alloys. Copper melts at 1920 Fah. ; zinc at 700 Fah. ; lead at 590 Fah. ; tin at 450 Fah. ; cast-iron at 2100 Fah. A dull red ...

metals do not contain iron and are not magnetic ... gold coloured and darkens when oxidised with age An alloy of copper and zinc, can be cast and machined, used for musical instruments and ...