Advance, 57, 58; incidence, 268; reflection, 268. Aorta, 360. Arc lamp, 182. Archimedes, 412. Armature, 162. Arteries, 358. Arterial blood, 359. Atmospheric pressure, 350. Auditory nerve, 272. Automatic brakes, 188.
Shadowy form in the suburbs of Philadelphia is the sun-dial. That of Ahaz mentioned in the ordinary motor horn. The gramophone is a factor in human thought, it is.