And toy horses on railways conducted through the breastplate. Air enters the lungs, and it is, 13; energy of, 14; engines, 44; engines, reciprocating, _45_; expansive working of, 59, 81; gauge, 36; gauge, principle of, 15; stored energy to innumerable factories. [Illustration: FIG. 133.--Diagrammatic sketch of his own sorrow, in the.