415 



kind of steel and form for a compass 

 needle, ii. 141. 



Bakerian Lectures ; by Capt. Sabine : 

 Experiments to determine the 

 amount of dip of the magnetic needle 

 in London, Aug. 1821, ii. 155. 



by Mr. J. F. W. Herschel : 



on certain motions produced in 

 fluid conductors when transmitting 

 the electric current, ii. 208. 



by Mr. Faraday : on the 



manufacture of glass for optical pur- 

 poses, ii. 383. 



Balance of torsion constructed with 

 threads of glass, ii. 402. 



Barium, chloride of, on the compo- 

 sition of, ii. 377. 



Bark of trees, on the formation of, i. 

 258 ; inconvertibility of, into albur- 

 num, i. 290. 



Barker (T.), register of the barometer, 

 thermometer, and rain, at Lyndon, 

 for 1798, i. 5. 



Barks, on the infusions of, i. 117. 



Barlow (P.) on the effects produced 

 in the rates of chronometers by the 

 proximity of iron, ii. 152; on the 

 anomalous magnetic action of hot 

 iron between the white and blood- 

 red heat, ii. 164; on the daily va- 

 riation of the horizontal and dipping 

 needles under a reduced directive 

 power, ii. 197; on the temporary 

 magnetic effect induced in iron bo- 

 dies by rotation, ii. 241 ; method for 

 determining the dispersive ratio of 

 glass, and computing the radii of 

 curvature for achromatic object- 

 glasses, ii. 316; on the deflections 

 produced in a magnetized needle by 

 an iron shell, ii. 318, remarks by 

 Mr. Christie, ii. 347 ; experiments 

 on the construction of an achromatic 

 telescope with a fluid concave lens, 

 ii. 333 ; on the effect of temperature 

 on the refractive index and dispersive 

 power of expansible fluids, and on 

 the influence of these changes in a 

 telescope with a fluid lens, ii. 345 ; 

 account of the construction of a re- 

 fracting telescope of 7'8 inches aper- 

 ture, ii. 356. 



Barometer : observations on a diurnal 

 variation of, between the tropics, i. 

 185 ; marine, observations upon, i. 

 230 ; thermometrical, for measuring 



altitudes, ii. 68; measurement of 

 Snowdon by, ii. 132 ; extraordinary 

 depression of the, ii. 163 ; differen- 

 tial, Dr. Wollaston's, ii. 363. 



Barometrical measurement, compari- 

 son of, with the trigonometrical de- 

 termination of a height at Spitzber- 

 gen, ii. 217. 



Basalt, observations on, i. 151. 



Bauer (F.) on the fungi which consti- 

 tute the colouring matter of red snow, 

 ii. 128; microscopical observations 

 on the Vibrio tritici, ii. 179. 



Bees, on the economy of, i. 268 ; ii. 346. 



Bell (C.) on the nerves, ii. 153, 171 ; 

 on the motions of the eye, ii. 190, 

 195 ; on the nervous circle which 

 connects the voluntary muscles with 

 the brain, ii. 266 ; on the nerves of 

 the face, ii. 380. 



Bell (T.) on the structure and use of 

 the submaxillary odoriferous gland 

 in the genus Crocodilus, ii. 309. 



Benares, meteorological journal at, 

 during 1824, -25, and -26, ii. 340. 



Berzelius (Dr. J.) on the alcohol of sul- 

 phur, or sulphuret of carbon, i. 465. 



Bevan (B.) on the heights of places in 

 the Trigonometrical Survey of Great 

 Britain, and upon the latitude of 

 Arbury-Hill, ii. 185 ; on the elasti- 

 city of ice, ii. 276 ; experiments en 

 the modulus of torsion, ii. 362. 



Bicarburet of hydrogen, a new com- 

 pound, ii. 248. 



Binomial theorem, new demonstrations 

 of the, i. 239; ii. 52, 70. 



Birds : grazing, on the gizzards of, i. 

 370 ; on the small intestines of, i. 

 404 ; on the migration of, ii. 204 ; 

 on the respiration of, ii. 375 ; more 

 sensible than other animals to the 

 stimulus of oxygen, ii. 375. 



Bitter-spar, carbonate of lime, and iron- 

 stone, on the primitive crystals of, i. 

 423. 



Bitumen : on the change of some of 

 the proximate principles of vege- 

 tables into, i. 159; in stones, on, ii. 

 202. 



Blagden (Sir C.) on vision, i. 454. 



Blindness, case of a lady who received 

 sight at an advanced age, ii. 289. 



Blood : on the circulation of the, i. 

 298, 314 ; foetal, aeration of in dif- 

 ferent animals, i. 374 ; chemical re- 



