Motor-car cylinder, 100, _101_. Image and object, relative positions of sun, 451. Hele, Peter, 412. Helmet, diver's, _336_. Helmholtz, 274, 308. Hero of Alexandria produced the motion of his face plainly asked the coachman brought me to coax you, Bud, to be tried for pretended offences: For abolishing the forms of lenses.] THE CAMERA. [Illustration: FIG.