INDEX to VOL. III. 



x\CIDS: — difference between acetic 

 and formic, 73; phosphovinic, 73; 

 manufacture of sulphuric, 115; com- 

 pounds of chromic acid with metallic 

 chlorides, 235; preparation of formic, 

 313 ; analysis of anchusic, 382 ; am- 

 breic and cholesteric, S82. 



Acoustic figures, 144. 



Adam (Dr.) on the osteological forms 

 in adults of the human species, 457. 



Addison ( W.) on an extraordinary me- 

 teor seen at Malvern, 37. 



Airy (Prof.) on the mass of Jupiter, 

 233 ; deductions founded on obser- 

 vations of the aurora borealis of Sep- 

 tember 17 and October 12, 461. 



Alepisaurus, a new genus of fishes, 379. 



Allan (Thomas), memoir of, 317. 



Almonds, bitter, composition of oil of, 

 389. 



Ambreine, on, 382. 



Ammonia and carbonic acid, on the 

 combinations of, 457. 



jiraneidce, undescribed genera and spe- 

 cies of, 104, 187, 344, 436. 



Aricina, M. Pelletier on, 311. 



Arseniates, phosphates, and modifica- 

 tions of phosphoric acid, 451, 459. 



Astronomy : — latitude and longitude 

 of the Cape Observatory, 231 ; posi- 

 tions of stars near the South Pole, 

 231 ; on the mass of Jupiter, 233 ; 

 on the visibility of stars by day, 238 ; 

 on the attraction of spheroids, 235, 

 282 ; the elements of g Bootis and 

 of y Virginis, 290 ; on a standard of 

 optical power, 291. 



Atmosphere, impregnations of near 

 the sea, 465. 



Atomic weights, on, 448. 



Atropia, 464. 



Aurora borealis, on a brilliant arch of 

 an, 422 ; deductions founded on ob- 

 servations of those of September 17 

 and October 12, 461. 



Ball- Pendulum,on the theoryofthe,l 85. 



Barton (J.) on the inflection of light, 

 in reply to the Rev. B. Powell, 172; 

 Rev. B. Powell's remarks on, 412. 



Beek (C. T.) on the Gopher- wood of 

 the Scriptures, 103. 



Bell (Mr.) on two reptiles hitherto 

 undescribed, 375; on the neck of the 

 Three-toed Sloth, 376. 



Bennett (E. T.) on the new genus 

 Lagotis, 149; on Felis viverrinus, 294. 



Bennetts (John) on the electro-mag- 

 netism of veins of copper-ore in 

 Cornwall, 17. 



Bernoulli's solution of the problem of 

 shortest twilight, Mr. Davies on, 

 179, 277. 



Bevan (B.) on the modulus of elasti- 

 city of gold, 20; table of sines to cen- 

 tesimal parts of the versed sine, 99. 



Bismuth and lead, separation of, 389. 



Bismuth, peroxide of, 387. 



BJackwall (J.) on some undescribed 

 Araneidce, 104, 187, 344, 436. 



Breath, on holding it for a lengthened 

 period, 241. 



Brewster (Sir D.) on the diamond, 

 219; on certain changes of colour 

 in the choroid coat of the eye, 289 ; 

 on the crystalline lens, 446. 



British Association, 151. 



Brown (R.) on the new genus Lira- 

 nanthes, 70. 



Bryce (J.), list of the simple minerals 

 of the North of Ireland, 83. 



Cambridge Philosophical Society, 235, 

 461. 



Cape Observatory, latitude and longi- 

 tude of, 231. 



Carbonic acid and ammonia, on the 

 combinations of, 457. 



Carmine, analysis of, 381. 



Cast iron, cohesion of, 79. 



Challis (Rev. J.) on the theory of the 

 ball-pendulum, 185. 



Charcoal, on its ignition in atmospheric 

 temperatures, 1 ; cause of the spon- 

 taneous combustion of, 89. 



Chemical symbols, on the use of, 443. 



Chemistry of geology, on the, 20. 



Chlorides, metallic, with chromic acid, 

 compounds of, 235. 



Chlorine, on an unobserved property 

 of, 72. 



Chlorophylle, analysis of, 381. 



Christie (S. H.) on the laws of mag- 

 neto-electric induction, 141 ; on ter- 

 restrial magnetism, 215. 



Chromic acid with metallic chlorides, 

 compounds of, 235. 



Coal, on the nature of, 245. 



Coal-measures and fossil fruits, disco- 

 vered in Leicestershire, 76, 112. 



Coleopterous insects, new genera and 

 species of, 151. 



Colour and odours, influence of heat 

 on, 458. 



