CHAPTER V.

GENERAL PROPERTIES OF STEEL.--Four Conditions: Solid, Plastic, Granular, Liquid. Effects of Heat. Size of Grain. Recalescence, Magnetism. Effects of Cooling, Hardening, Softening, Checking. Effects of Forging or Rolling, Hot or Cold. Condensing, Hammer-refining, Bursting. Ranges of Tenacity, etc. Natural Bar, Annealed Bar, Hardened Bar, etc. 52