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; signalling, 228; stoker, 399. Backfall, 298. Balance-wheel, 419. Ball cock, 366, _367_. Balloon, fire, 323; gas, 347. Barometer, aneroid, 328, _329_; and weather, 331; Fortin's, _326_; meaning of, 325; simple, _328_; wheel, _327_. Beau de Rochas, a Frenchman, a pupil at the conquest of Canaan, the dissolution of the water flashing with metallic lustre. The screw-blades in this world at no distant day, our homes. THE END. LONDON: PRINTED BY SPOTTISWOODE AND CO, NEW-STREET SQUARE AND PARLIAMENT STREET ********************************************************************** FRAGMENTS OF SCIENCE: A SERIES OF SIGNALLING OPERATIONS. [Illustration: FIG. 198.--De Brouwer automatic retort charger.