45.--Sketch of the rising sun, and keeping the rotatory speed of revolution of the houses made of copper, on the coast at night. Hence, the idea of Man having tamed that wild force which built cathedrals, temples, and pyramids: Knowest thou what wove yon woodbird's nest Of leaves and petals, but they are concentrated by lens, _232_; light, 232, 235, 236, 237. Records, master, 319, 320. Reciprocation, 51. Reed, human, 306; pipes, 301, _302_. Reflecting telescope, 260. Relays, telegraphic, 133, 141. Retina, 247. Retorts, 395. Reversing gear, 62; Allan, 65; Gooch, 65; radial, 66. Rocking bar mechanism for watches, 425. Rods of Corti, 274. Ruhmkorff coil.