INDEX. 



ACHROMATIC object-glasses : on 

 the centering of, ii. 157; on com- 

 puting the radii of curvature for, ii. 

 316; applicable to the improvement 

 of the microscope, ii 399. 



Achromatic telescope with a fluid con- 

 cave lens, on constructing, ii. 333, 

 345, 356. 



Acids, influence of upon the composi- 

 tion of urine, i. 469. 



Aeration of the foetal blood of animals, 

 i. 375. 



Agate, polarizing power of the, i. 453, 

 490. 



Air-pump and condenser, new, i. 460. 



Airy (G. B.) on the figure of the earth, 

 ii. 290 ; on a correction of the solar 

 tables required by Mr. South 's obser- 

 vations, ii. 305 ; on the corrections 

 in the elements of Delambre's solar 

 tables required by the observations 

 made at the observatory, Greenwich, 

 ii. 328. 



Albumen, observations on, i. 341. 



Alcohol: proportion of, contained in 

 several kinds of wine, i. 408 ; on the 

 state in which it exists in fermented 

 liquors, i. 450 ; the vapour of, pro- 

 posed for propelling machinery, ii. 

 98 ; on the mutual action of alcohol 

 and sulphuric acid, ii. 271, 350. 



Alcohol of sulphur, or sulphuret of car- 

 bon, experiments on, i. 465. 



Alimentary substances, on the compo- 

 sition of, ii. 321. 



Alkalies : fixed, decomposition of by 

 electricity, i. 278 ; on the nature of 

 the, i. 318, 350. 



Allen (W.) on the changes produced in 

 atmospheric air, and oxygen gas, by 

 respiration, i. 305 ; on the quantity 

 of carbon in carbonic acid, and on the 

 nature of the diamond, i. 272 ; on 

 respiration, i. 345 ; on the respira- 

 tion of birds, ii. 375. 



Allman (Dr.W.) on clearing equations 

 of quadratic and higher surds, i.478. 



Altona and Greenwich, experiments to 

 determine the number of vibrations 

 made by an invariable pendulum at, 

 ii. 403. 



Alvine concretions found in the colon 

 of a young man after death, ii. 156. 



Ambuscade, Dutch Frigate, account of 

 the sinking and mode of raising, i. 

 124. 



America and Asia, on the question 

 whether they are contiguous, or are 

 separated by the sea, ii. 81. 



Amidine, gum, ii. 105. 



Ammonia: on the elements of, i. 318, 

 347, 350; decomposition of, i. 314; 

 experiments on, i. 345, 346. 



Amphibia, on the urinary organs and 

 secretions of, ii. 94. 



Analysis, considerationof various points 

 of," i. 506. 



Anderson (Capt. J.) on the tides be- 

 tween Fairleigh and the North Fore- 

 land, ii. 113. 



Anhydrous carbonate of copper, i. 479. 



Animal and vegetable substances, on 

 the ultimate analysis of, ii. 179. 



Animal heat: influence of the brain 

 on the generation of, i. 439 ; expe- 

 riments on, i. 515; on the influence 

 of nerves and ganglions in producing, 

 ii. 238 ; influenced by the nerves, ii. 

 259. 



Animal secretions, on, i. 342. 



Animal system, the action of poisons 

 on, i. 427. 



Animals : slow-moving, peculiarity in 

 the distribution of the arteries of, i. 

 7, 132, 212; on the breeding of, i. 

 343 ; luminous, observations on, i. 

 379 ; on the formation of fat in the 

 intestines of, i. 462 ; on the feet of 

 those whose progressive motion can 

 be carried on against gravity, ii. 38, 



