Latent heat of water, 266.
Latent image, formed at low temperatures, 202; Bose's theory of,
203; photo-electric theory of, 204, 209 _et seq._
Least action, law of, 66.
Lembert and Richards, atomic weight of lead, 27.
Length of life dependent on conditions of structural development,
93; dependent on rate of reproduction, 94.
Life-curves of organisms having different activities, 92.
Life, length of, 91.
Life waves of a cerial, 95; of Ausaeba, 87; of a species, 90.
Light, effects of, in discharging negative electrification, 204;
chemical effects of, 205; experiment showing effect of, in
discharging electrified body, 205.
Lindemann, Dr., duration of solar heat, 29.