Disease', vol. I.] This is a registered trademark, and any other work associated with the besom of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive source of error in cylinder, 52. Light, electric, 179; nature of, 270; board of organ, 296; board of piano, 283. Advancing the spark, 102. Air-gun, _342_. Air-pump for cycle tyres, _340_; for Westinghouse brake, 199. Alternating currents, 164; dynamo, 164. Amperage, 125. Angle of advance, 57, 58; incidence, 268; reflection, 268. Aorta, 360. Arc lamp, 182. Archimedes, 412. Armature, 162.