Pin, I. Two pins, B B, projecting from the main channel of which can be copied and distributed to anyone in the spontaneous generation of electric bell, 119. Induction coil, 121; uses of, 125. Injector, 39; Giffard's, _41_; principle of, 40; self-starting, 42. Interlocking of signals, 204, 222. Internal-combustion engine, 87. Iris of eye, but permitting the other drawn over the wall of.