484: 



PHYSICAL SCIENCES. 



BRIGHTON. 



cidence in temperature of springs 

 and of the atmosphere determined 

 by, 238 ; temperature of a pole of 

 maximum cold determined, 245 ; 

 isogeothermal lines determined by, 

 246 ; observations on the light of 

 fixed stars, 402. 



Brighton, phenomenon caused by re- 

 flection observed from, 157. 



Brinkley, Bishop, mass of the moon 

 determined by, 56. 



British Channel, height of tides in, 

 98. 



Isles, atmospheric wave passing 



over, 121. 



Brorsen, M., periods of comets dis- 

 covered by, 370. 



Brown, Dr. Robert, peculiar 4 vegeta- 

 tion found by, in Australia, 251. 



Buchan, Dr., phenomenon caused by 

 reflection observed by, 157. 



CAESAR, Julius, era computed from 



his reign, 85. 

 Cagniard de la Tour, M., instrument 



designed by, measuring musical 



notes, 143. 

 Calms produced by the trade-winds, 



122, 123. 



Calorific rays. See Rays of heat. 

 Calotype, the invention of, 204. 

 Camelopard, nebulous system in, 417. 

 Canaries, the, vegetation of, 252. 

 Canary-glass, fluorescence of light in, 



196. 

 Cancer, the calms of, 123 ; the tropic 



of, marking the limit of the trade- 

 winds, 126 ; nebulous cluster in, 



415. 



Canis Major, position of, 390. 

 Venatica, nebulous system in, 



417. 

 Capillarity, theory of, 113; forces 



producing, 114; familiar examples 



of,. 115; curious phenomena, 115, 



116. 

 Capricorn, the calms of, 1 23 ; the 



tropic of, hurricanes changing their 



direction at, 126. 

 Carbon, its powers contrasted as a 



crystal and as an opaque amorphous 



substance, 302, 303. 



CERES. 



Carbonate of lime. See Lime. 



Carbonic oxide, its constituent parts, 

 111. 



acid, proportion of, in the atmo- 

 sphere, 117. 



Cardinal points, the, position of con- 

 tinental masses with regard to, in- 

 fluencing temperature, 244. 



Caribbean Islands, hurricanes begin- 

 ning at, 126. 



Castor, discovered by Sir William 

 Herschel, 396. 



Cassiopeia, star appearing and vanish- 

 ing in, 392, 393. 



Categat, the, consequence of its nar- 

 rowness, 98. 



Cauchy, M., data furnished by, for 

 investigation of the theory of li^ht, 

 201. 



Cayenne, variation in length of the 

 pendulum between Paris and, 51. 



Celestial bodies : law of their mutual 

 attraction, 4 ; of the solar system : 

 law determining their attraction to 

 the sun, 5 ; problem to fix the 

 positions of, on occurrence of dis- 

 turbance in their motions through 

 counteracting attractions, 11 ; 

 theory of their mutual connection 

 and dependence, 24 ; mode of find- 

 ing the absolute distances of, 43 ; 

 distances of, computed from their 

 parallax, 52, 54 ; apparent position 

 of, affected by refraction, 153, 

 154; apparent infinity of, 420. 



Centaur, position of, 390 ; brilliant 

 double star in, 399. 



Central Asia, the mountains of, their 

 ascent by Marco Polo, 118. 



Centre of gravity. See Gravity. 



Centrifugal force, moon's motions 

 modified by, 5 ; influence of, on 

 planet-forms, 6 ; retarding oscilla- 

 tions of the pendulum, 32 ; action 

 of, in determining the figure of the 

 earth, 44, 45 ; measurement of its 

 intensity, 49 ; resolved into two 

 forces, its action on the sea, 100. 



Ceres, astronomical tables of, 63 ; 

 height of her atmosphere, 226 ; 

 comet of 1770 revolving beyond 

 the orbit of, 361. 



