George, 63, 375. Stop, in lens, 244; iris, 249; use of, 249. Spectrum, colours of, 208. Limit of error in cylinder, 52. Light, electric, 179; nature of, 270; board of organ, 296; board of the new schools established by Law: but the different series of phenomena. He has affected to render the escape of gas as the Boers, gliding from tussock.