414- 



51 ; new classification of, founded 

 upon the structure of the placenta, 

 ii. 176; nature of the acid and sa- 

 line matters usually existing in the 

 stomachs of, ii. 204 ; on burrowing 

 and boring marine animals, ii. 278. 



Aqueous and igneous formations, ob- 

 servations tending to prove the ana- 

 logy between, i. 153. 



a, Aquilae, on the parallax of, ii. 101. 



Arago (M.) repetition of his experi- 

 ments on the magnetism of various 

 substances during rotation, ii. 249. 



Arbury Hill, on the latitude of, ii. 185. 



Ardea Argala, description of the sol- 

 vent glands and gizzard of, i. 449. 



Argonauta, on the, ii. 75, 76, 108. 



Arseniates : of copper and of iron, 

 from Cornwall, description of, i. 43 ; 

 analysis of,i. 45; oflead, native, i.331. 



Arteries, on the influence of the nerves 

 upon the action of, i. 513. 



Asia and America, on the question 

 whether they are contiguous, or are 

 separated by the sea, ii. 81. 



Asia, on the geography of the north- 

 eastern part of, ii. 81. 



Astronomical and other instruments, 

 method of dividing, i. 323, 333, 335, 

 504. 



Astronomical observations, i. 494 ; ii. 

 135, 340. 



Astronomical refractions, on, ii. 200, 

 207. 



Astronomy, physical, i. 7, 150; ii. 409. 



Atlantic, relative height of the Atlan- 

 tic and Pacific oceans, ii. 385. 



Atmosphere : on the dispersive power 

 of, ii. 28 ; on the temperature of the, 

 ii. 73 ; on the finite extent of the, ii. 

 160 ; on the constitution of the, ii. 267. 



Atmospheric air and oxygt-n gas, 

 changes produced in by respiration, 

 i. 305. 



Atmospherical refraction, on, i. 16, 

 371, 500 ; ii. 200, 207, 296, 308. 



AtterclifFe church, description of the 

 sounding-board in, ii. 349. 



Attraction of a spheroid, on the ex- 

 pansion in a series of the, ii. 162. 



Attraction of such solids as are termi- 

 nated by planes, i. 433. 



Attractions, elective, i. 325. 



Aurora Borealis : on the height of the, 

 ii. 342, 361 ; on a definite arrange- 

 ment, and order of the appearance 



and progress of, ii. 360 ; on the in- 

 fluence of on the magnetic needle, 

 ii. 391. 



Austin (Rev. G.) on a new condenser 

 and air-pump, i. 460. 

 B. 



Babbage (C.), essay towards the cal- 

 culus of functions, ii. 29, 4 1 ; on the 

 analogy which subsists between the 

 calculus of functions and other 

 branches of analysis, ii. 69; new 

 methods of finding the sums of se- 

 veral classes of infinite series, ii. 115 ; 

 repetition of M. Arago's experiments 

 on the magnetism of various sub- 

 stances during the act of rotation, 

 ii. 249 ; on a method of expressing 

 by signs the action of machinery, 

 ii. 27t3 ; on electrical and magnetic 

 rotations, ii. 287, 293. 



Baily (F.) on the solar eclipse said to 

 have been predicted by Thales, i. 400. 



Bakerian Lectures ; by Dr. Young : 

 on the mechanism of the eye, i. 35 ; 

 on the theory of light and colours, 

 i. 63 ; experiments and calculations 

 relative to physical optics, i. 131. 

 by Dr. Wollaston : on the 



quantity of horizontal refraction, 

 with a method of measuring the dip 

 at sea, i. 100; on the force of per- 

 cussion, i. 213; on the elementary 

 particles of certain crystals, i. 445 ; 

 on a method of rendering platina 

 malleable, ii. 352. 



by Sir H. Davy : on some 



chemical agencies of electricity, i. 

 246, 278 ; researches on the nature 

 of certain bodies, particularly the 

 alkalies, phosphorus, sulphur, car- 

 bonaceous matter, and the acids hi- 

 therto undecompounded, i, 3 1 8, 347 ; 

 on some new electro-chemical re- 

 searches, i.350; on the combinations 

 of oxymuriatic gas and oxygen, i. 

 385 ; on the relations of electrical 

 and chemical changes, ii. 281. 



by Mr. W. T. Brande : on 



some new electro-chemical pheno- 

 mena, i. 480; on the composition 

 and analysis of the inflammable ga- 

 seous compounds from coal and oil, 

 and on their heating and illuminating 

 powers, ii. 119. 

 by Capt. Kater : on the best 



