INDEX. 



AARON Reschid, 456. 



Aberration from colour, 337. 



Aberration of light, 363, PI. 29. 



Aberration of the stars, 341, 342, 379. 



Abutments, 125. 



Academicians, 289. 



Academy del Cimento, 489, 585. 



Academy of Paris, 191, 192, 279, 280, 585. 



Academy of Petersburg, 585. 



Accelerated motion, PI. 1. 



Accelerating forces, 21. 



Acceleration, 22. 



Acceleration of the moon's motion, 414. 



Acceleration of tides, 447, 448. 



Accidental properties of matter, 465. 



Accommodation of the eye, 353. 



Accompaniment, 308. 



Accumulation of electricity, 517 



Achard, 589. 



Achernar, 395. 



Achromatic eye piece, 337. 



Achromatic glasses, 337 



Achromatic telescopes, 379, PI. 28. 



Acids, 524. 



Acoustics, 195, 287- 



Acting pump, PI. 23. 



Action of water on lead, 277- 



Actual focus, 324. 



Adair, 558. 



Adhesion, 112, 117, 119,480. 



Adsiger, 583. 



Advancement of science, 589. 



Aeolian harp, 299, 312. 



Aepinus, 507, 531, 586. 



Aerial perspective, 356. 



Africa, 437. 



Aggregation, 480. 

 Agitation, 163, 178. 



Agricultural instruments, 175. 



Air, 232. Buoyancy of the air, 29. Resistance 



of the air, 30, 31, 154, 232, 260, 261, 284. 

 Air consumed, 486. 

 Air gun, 173, 269, PI. 24. 

 Air pump, 205, 260, 278, PL 24. 

 Air thermometer, 498, PL 39. 

 Air vents, 241. 

 Air vessel, 138, 255. 

 Ajutages, 212, 213. 

 Albategni, 456. 

 Albertus, 285. 



Albinus, 88, 90; b. 1683, d. 1771. 

 Alcohol, 497. 

 Aldebaran, 395- 

 Aldini, 523, 588. 



Aldrovandus, 583, 584; b. 1525, d. 1605. 

 Alembert. See Dalembert. 

 Alexander, 182, 454. 

 Alexandria, 75, 183. 

 Alexandrian school, 453, 454. 

 Alfred, 186. 

 Algenib, 394, 395. 

 Algol, 393, 394, 395. 

 Alhazen, 375; fl. 1072. 

 Alkalis, 524. 

 Allineations, 394, 395. 

 Almagest, 456. 

 Almamoun, 456; 4a33. 



Alteration, 105, 109. 



Alternate motion, PL 14. 



Alternation of motion, 257- 



Altitude, PL 35. 



Alva. Duke of Alva, 187- 



Amontons, 191, 256,278; b. 1663, d. 1705. 



Amphibia, 575. 



Anatomy of plants, 568. 



Anaxagoras, 581, 582. 



Anaximander, 581 ; b. 611, d. 547, B. c. 



Anaximenes, 581, 582. 



Anchor. Weighing an anchor, 158. 



Andr6, 93. 



Andromeda, 395. 



Aneurisms, 227- 



Angles, 80. 



Angles of incidence and reflection, 322. 



Anglonorman architecture, 187- 



Animal actions, 98. 



Animal electricity, 523. 



Animal force, 69. 



Animal life, 573. 



Animal light, 340. 



Animal motions, 49. 



Animals, 566. 



Anne, 190. 



Annealing, 494. 



Anoria, PL 22. 



Antares, 395. 



Anthelia, 347- 



Antimony, 532. 



Antiochus, 582. 



Anvil, 61. 



Anvils, 170. 



Anvil of the ear, 302. 



Apollodorus, 186 ; fl. 120. 



Apollonius Pergaeus, 183, 455 ; fl. 242, B.C. 



Apparent attractions, repulsions, and cohesions, 

 PL 39. 



Apparent diameter of the sun, 416. 



Apparent motion of the sun, 416. 



Apparent motions, 425. 



Apparent motions of the stars, 416. 



Appearances of the celestial bodies, 415. 



Apsides, PL 34. 



Aquarius, 401. 



Aqua tinta, 93. 



Aqueous humour, 350. 



Aquila, 395. 



Arabians, 186, 188, 456. 



Arago, 372, 542. 



Aratus, 463 ; b. 300, B.C. 



Arch, 123, 182, PL 11. 



Archimedes, 28, 44, 50, 184, 185, 189, 190, 236, 

 251, 275, 276, 375, 433, 454, PL 22 ; d. 212, B.C. 



Architecture, 121, 182, 187. Hydraulic architec- 

 ture, 235, 237, 238. 



Arch lute, 312. 



Archytas, 182 ; b. 442, d. 352, B.C. 



Arcs of circles, PL 6. 



Arcturus, 392, 395, 397- 



Are, 84. 



Aretin, the monk, 316. 



Argo, 395. 



Aries, 395, 401. 



Aristarchus, 454 ; fl. 264, B.C. 



Aristophanes, 374. 

 2 Q 



