614 



INDEX. 



BAROMETER, on the diurnal variations of the. H. 

 iv. 23. 



description of a, which marks the rise and 



fall of mercury from two different times of obser- 

 vation. P. C. iv. 209. 



of the diurnal variations of the. H. v. 3. 



on the horary oscillations of the, near Edin- 

 burgh, xii. 153. 



BAROMETRICAL MEASUREMENTS, on the causes 



which affect the accuracy of. P. C. i. 87- 

 BASALTES of the coast of Antrim, remarks on the. 



H. v. 15. 

 BEATTIE (DR JAMES), remarks on some passages 



of the sixth book of the iEneid. L. C. ii. 33. 

 BELEMNITE, observations on the structure of the. 



ix. 393. 

 BLACK (DR JOSEPH), an analysis of some hot 



springs in Iceland. P. C. iii. 95. 



minutes of the life and character of. H. v. 



101. 



BLACKADDER (HENRY HOME), on the con- 

 struction of meteorological instruments which de- 

 termine the indications during absence, x. 337. 



description of a new register thermometer, 



without any index, x. 440. 



BLAIR, BART. (SIR JAMES HUNTER), biogra- 

 phical account of. H. iii. 31. 



BLAIR (DR ROBERT), experiments and observations 

 on the unequal refrangibility of light. P. C. iii. 3. 



BLANE (DR G.), account of a hurricane at Barba- 

 does. H. i. 30. 



BLAST FURNACES, practical remarks on. v. 31. 



BLENDE, on the composition of. xi. 332. 



BLIZARD (THOMAS), description of an extra- 

 uterine fcetus. v. 189. 



BONAR (JAMES), disquisitions on the origin and 

 radical sense of the Greek prepositions, v. 305. 



BOY, some account of a, born blind and deaf, 

 vii. 1, 



additional communications respecting, viii.129. 



on his education, by Dr H. Dewar. viii. 137. 



BRAHMINS, remarks on the astronomy of the. P. C. 

 ii. 135. 



observations on the trigonometrical tables of 



the. P. C. iv. 83. 



BRAMBLE, account of a variety of the. H. iii. 20. 



BRAIN, pathological observations on the- P.C. ii. 17. 



BRAZILIAN STONE, of the flexibility of the. P. C. 

 iii. 86. 



BREWSTER, LL.D. (DAVID), demonstration of the 

 fundamental property of the lever, vi. 397. 



on the optical properties of sulphate of car- 

 bon, &c. vii. 285. 



on a new species of coloured fringes produced 



by the reflection of light between two plates of 

 parallel glass of equal thickness, vii. 435. 



on the action of transparent bodies upon the 



differently coloured rays of light, viii. 1. 



BREWSTER, LL.D. (DAVID), description of a new 

 darkening glass for solar observations, viii. 25. 



on the optical properties of muriate of soda, 



fluate of lime, and the diamond, viii. 157. 



on a new optical and mineralogical property 



of calcareous spar. viii. 165. 



on the effects of compression and dilatation in 



altering the polarizing structure of doubly refracting 

 crystals, viii. 281. 



on the laws which regulate the distribution 



of the polarizing force in plates, tubes, and cylin- 

 ders of glass, viii. 353. 



on circular polarization, as exhibited in the 



optical structure of the amethyst, ix. 139. 



observations on the mean temperature of the 



globe, ix. 201. 



account of the native hydrate of magnesia, 



discovered by Dr Hibbert in Shetland, ix. 239. 



account of a remarkable structure in apophyl- 



lite, with observations on the optical peculiarities 

 of that mineral, ix. 317. 



description of a monochromatic lamp for mi- 

 croscopical purposes, &c. ix. 433. 



on the existence of two new fluids in the 



cavities of minerals, x. 1. 



description of hopeite, a new mineral from 



Altenberg. x. 107. 



on a new species of double refraction accom- 

 panying a remarkable structure in the mineral 

 called Analcime. x. 187. 



results of the thermometrical observations 



made at Leith Fort, every hour of the day and 

 night, during the whole of the years 1824 and 1823. 

 x. 362. 



on the refractive power, and other properties 



of the two new fluids in minerals, x. 407. 



on the construction of polyzonal lenses, and 



their combination with plain mirrors for the pur- 

 poses of illumination in light-houses, xi. 33. 



account of a remarkable peculiarity in the 



structure of glauberite. xi. 273. 



on certain new phenomena of colour in La- 



brador felspar, with observations on the nature and 

 cause of its changeable tints, xi. 322. 



on a new analysis of solar light indicating 



three primary colours, forming coincident spectra of 

 equal length, xii, 123. 



on a new species of coloured fringes, produced 



from reflection between the lenses of achromatic 

 compound object glasses, xii. 191. 



(now SIR DAVID), observations on the lines 



of the solar spectrum, and on those produced by 

 the earth's atmosphere, and by the action of nitrous 

 acid gas. xii. 519. 

 on the colours of natural bodies, xii. 538. 



BREWSTER (REV. JAMES), remarkable case of 

 Margaret Lyall, who continued in a state of sleep 

 nearly six weeks, viii. 249. 



