r>94 



INDEX. 



Aristotelians, 12. 



Aristotle, 5, 19, 183, 275, 315, 316, 374, 442, 577, 



582, PL 22; b. 385, d. 322, B.C. 

 Aristyllus, 454. 

 Arkwright, 101, 142, 187- 

 Arnault, 146. 

 Arnold, 151, 154, PL 16. 

 Arrangement of particles, 480. 

 Arrangement of the stars, 392. 

 Arrow, 173. 

 Arrowsmith, PI. 42, 43. 

 Arsenic, 532. 

 Artedi, 575. 

 Arteries, 220. 

 Artificial globe, 432. 

 Artificial magnets, 537- 

 Arytaenoid cartilages, 312,313. 

 Ascent, 25. 



Ascent of a double cone, PI. 3. 

 Ascent of a loaded cylinder, PI. 3. 

 Ascent of water, PI. 39. 

 Ash, 587. 



Astronomer Royal, 461. 

 Astronomical instruments, 426. 

 Astronomical telescope, 334. 

 Astronomical time, 429. 

 Astronomy, 387. Practical Astronomy, 425. 

 Athenaeus, 185, 582 ; fl. 136. 

 Atmosphere, 206, 546, PL 19, 24. 

 Atmosphere of Jupiter, 450, 548. 

 Atmosphere of the sun, 399, 400. 

 Atmospherical pressure, 207. 

 Atmospherical refraction, 345, PL 29. 

 Atmospheric machine, 258. 

 Atmospheric tides, 450. 

 Atoms, 469, 581. 

 Attachment of horses, 167. 

 Attalus, 186. 



Attraction of a sphere, 410. 

 Attraction of moisture, 553. 

 Attractions and repulsions of electrified bodies, 



511. 



Attractions of floating bodies, 478, 513. 

 Attractions of solids and fluids, 476. 

 Attractions of the electric fluid, 508. 

 Attrition, 120. 



Atwpod's machine, 23, 41, 118, PL 1. 

 Auriga, 394. 



Aurora boreal is, 533, 560. 

 Avicenna, 147. 

 Avoirdupois, 96. 

 Axes of rotation, 66. 

 Axis and wheel, 51. 

 Axis and winch, 157. 

 Axles, 116. 

 Azimuth compass, PI. 41. 



.'),'. - 



Babylonian observations, 452. 



Bacon. Roger Bacon, 188, 227, 375, 583 ; b. 1214, 



d. 1292. 

 Bacon. Lord Verulam, 5, 12, 189, 316, 458, 582, 



583; b. 1560, d. 1626. 

 Bag, 203. 



Bag pump, 254, PL 23. 

 Bailly, 452. 

 Baily, 440. 



Balance, 146, PL 8, 9. 

 Balance. Hydrostatic balance, 235. 

 Balances, 96. 

 Balance spring, 147. 

 Ballast, 249. 

 Balloon, 206, 265. 

 Bank, 200. 

 Banking, 153. 

 Banks, 238. 

 Bark, 569. 

 Barlow, 95. 



Barometer, 550, 556, 584, PI. 19. 

 Barometers, 208. 



Barrel chronometer, 146. 

 Barrow, 190, 377; b. 1630, d. 1677- 

 Bartholin, 378 ; b. 1616, d. 1680. 

 Barton, PL 4. 

 Baskets, 168. 

 Bass, 312. 

 Batsha, 449,464. 

 Battering ram, 179. 



Battery, 513. 



Battery of Volta, 563, 588. 



Bauhin, 584. J. Bauhin, b. 1541, d. 1613. C. 



Bauhin, b. 1560, d. 1624. 

 Bayer, 394. 

 Bead pump, 256. 

 Beads in equilibrium, PL 11. 

 Beam, 114, 115. 

 Beam compasses, 78, PL 6. 

 Beams, PL 10. 



Beams in equilibrium, PI. 11. 

 Bear, 394. 

 Beat, PL 25. 

 Beats, 305. 

 Beccaria, 558. 

 Becquerel, 504. 

 Beguelin, 381. 



Beighton, 266, 279, 282, PI. 24. 

 Bell, 314. 



Bell. Henry Bell, 271. 

 Bellows, 200, 262, PL 24. 

 Benedetti, 189. 

 Bennet, 109, 110, 527, PL 40. 

 Bent columns and bars, PL 9. 

 Bent lever, PL 3. 

 Bent lever balance, 96, 98, PL 9. 

 Bent pipes, 227- 

 Bent straps, PL 13. 

 Berard, 504. 



Bergmann, 586 ; b. 1735, d. 1784. 

 Bernoulli, 46, 155, 203, 228, 268. D. Bernoulli, 



191, 210, 213, 280, 281, 296, 300, 317, 498, PL 



20, 22, 39. Ja. Bernoulli, 191, 279 ; I*. 1654, d. 



1705. Jo. Bernoulli, 191, 279, 281, 282; b. 



1667, d. 1748. 

 Berthoud, 153, 155. 

 Bertius, 583. 

 Bessel, 390, 404. 

 Beudant, 291. 



Bevilled wheels, 136, PL 15. 

 Bianconi, 290. 

 Biceps, 99. 

 Billiard balls, PL 5. 

 Billiards, 62. 

 Biot, 285, 371. 

 Bird, 461. 

 Birds, 574, 575. 

 Birmingham, 187. 

 Biscop, 186. 

 Bissextile, 427. 

 Bistre, 73. 

 Bito, 186. 



Black, 285, 501, 586; b. 1728, d. 1799. 

 Blackening rays, 490. 

 Blackfriars bridge, 126, PL 12, 14. 

 Blasting, 180. 

 Blast of air, 200. 

 Blocks, 53, 176, PI. 4. 

 Blood, 573, 574, 578. 

 Blow, 61. 



Board of longitude, 192,461. 

 Board perforated, 1 12. 

 Bode, 433. 



Body. Moveable body, 38. 

 Body colours, 73. 



Boerhaave, 498, 586 ; b. 1668, d. 1738. 

 Boiling, 492. 

 Bolognan jars, 494. 



Bolts, 



Bones of the ear, PI. 25. 



Bootes, 395. 



Borda, 84, 85, 282; b. 1733, d. 1797- 



Borelli, 99. 



Boring, 175. 



Boscovich, 359, 360, 3C2, 381, 471, 587; b. 1711, 



d. 1787- 

 Bossut, 284. 

 Botany, 586. 



Bottom of a cistern, PL 19. 

 Bouguer, 280, 342, 379, 381, 421,545; b. 1698, 



d.1758. 



Boulton, 103, 117, 259, 267, 2G9. , 

 Bovillus, 34. 

 Bow, 173. 

 Boyle, 5, 278, 377, 585, PL 1<); b. 1027. 



d. 1691. 

 Braces, 130, PL 13. 



