Hearing, trumpet, [262]

Heat, nature of, [271]

Heat, sources of, [272]

Heat, relations of, to forms of matter, [13]

Heat, relation of, to bulk of liquids, [37]

Heat, relation of, to light, [273]

Heat producing expansion, [274], [275], [279]

Heat, communication of, [295]

Heat, convection of, [296]

Heat, conduction of, [297]