500 



PHYSICAL SCIENCES. 



KANE. 



KANE, Dr., Polar Sea discovered by, 

 94 ; cold of Northern Greenland 

 marked by, 247. 



Kappa Crucis, cluster of coloured stars 

 round, 419. 



Draconis, seen in the pole of the 



equator, 88, 89. 



Karsten, Mr., impressions made on 

 glass by electricity, 221. 



Kasan, summer and winter mean tem- 

 perature of, compared with Edin- 

 burgh, 246, 247. 



Kater, Captain, approximate length of 

 the pendulum, determined by, 89. 



Kempelen, M., speaking-machine in- 

 vented by, 151. 



Kepler, paths, revolutions of planets 

 discovered by, 5 ; his law regarding 

 the mean distances of planets from 

 the sun, 19 ; law of, applied to cal- 

 culating distances, 53, 54 ; rapidity 

 of planetary revolutions determined 

 by his law, 66 ; his law finding 

 areas described by heavenly bodies, 

 referred to, 360. 



Kew, balloon ascent from, 119. 



Knoblauch, position of the magne- 

 crystallic axis proved by, 349. 



Knowledge, limited nature of human, 2. 



Kotzebue, stratum in the ocean dis- 

 covered by, 101. 



Kratzenstein, M., instrument invented 

 by, articulating words, 151. 



Kupffer, M., observations of, on tem- 

 perature, 246. 



LA BASILICATA, earthquake in, 234. 



La Grange, his investigations into the 

 stability of the solar system, 20, 

 21 ; greatest discovery of, 23. 



La Hire, phases in comets observed 

 by, 380. 



La Place, stability of the solar system 

 proved by, 20 ; principle in astro- 

 nomical calculations established, 



23 ; angle of inclination fixed, 



24 ; his theory accounting for ac- 

 celeration in the moon's mean mo- 

 tion, 36, 37 ; result of observations 

 compared with his theory of Ju- 

 piter's satellites, 55 ; theory of 

 planetary motion, 65, 66 ; universal 



LATITUDE. 



epoch proposed by, 87 ; scientific 

 observations complementing his- 

 torical records, 87 ; date fixed by, 

 for the lunar tables of the Indians, 

 88 ; justifies Newton's theory of 

 tides, 96 ; density of a liquid column 

 estimated by, 114; action of the 

 earth on a comet. 359 ; change in a 

 comet's orbit, 361 ; cause of error 

 in Clairaut's calculation pointed out 

 by, 363 ; opinion of, as to the comet 

 of 1682, 378. 



" Lake of the Gazelles" ascribed to an 

 effect of reflection, 157. 



Lalande, epochs of conjunctions com- 

 puted by, 42. 



Lambda Herculis, general motion of 

 the stars determined by, 405. 



Land, dry, comparative extent of, on 

 the globe, 242, 244 ; extent of, in 

 diametrical opposition, 244. 



Landscapes in chiaroscuro, produced 

 by photography, 207. 



Languages, resemblances and analogies 

 between, 255, 256. 



Lapland, arcs of the meridian measured 

 in, 48 ; transit of Venus observed 

 in, 53. 



Laroche, M., his experiments on trans- 

 mission of radiant heat, 259, 261. 



Lassell, Mr., satellite of Saturn dis- 

 covered by, 32 ; observations of, on 

 Uranus' satellites, 33 ; his discovery 

 of Neptune's satellite, $.; observa- 

 tions on Saturn's rings, 66. 



Latent heat, energetic action of, onj 

 matter, 275-277. 



Latitude, the, of a planet defined, 

 mode of obtaining, 9, 10 ; cause of 

 periodical inequalities in, 15) per- 

 turbations from action of the per- 

 pendicular force, 18 ; moon's mo- 

 tion in, disturbed, 35; effects of 

 disturbance, 38 ; data of, used in 

 computing a planet's place in the 

 heavens, 58-60 ; conditions ensuring 

 the invariability of geographical, 

 76, 77 ; change effected by nutation 

 in, 81 ; climate not invariable in 

 the same, 239 ; degrees of, where 

 diminution of mean heat is most 

 rapid, 244, 245 ; the same meait: 



