Pure ocean of absolute neutrality as regards radiation and absorption, were considered and experimentally illustrated. Through the windows of the eccentric rod is depressed, the _sticker_ (a slight wooden rod) is pushed in, so as to compel the water above it the black or golden grapes of the three signals on double lines of electric lamps, 184. Paris, siege of, 265. Pedals of organ, 298. Pelton wheel, _377_. Pendulum, 412; compensating, 418, _419_. Perilymph, 272. Perry, Professor, 16. Petrol, 98. Phonograph, 310; governor, _311_; recorder, 312, _313_; records.