INDEX to VOL. XX. 



-AciD, on some derivatiyes of uramido- 



benzoic, 168. 

 Adams (A. L.), admitted, 414. 

 Adams (W. G.), admitted, 414. 

 Address of congratulation to the Queen, 



159. 



, acknowledgment of, 277. 



Airy (Gr. B.), corrections to the computed 

 lengths of waves of light published in 

 the Philosophical Transactions of the 

 year 1868, 21. 



■ , experiments on the directive power 



of large steel magnets, of bars of mag- 

 netized soft iron, and of galvanic coils, 

 in their action on external small mag- 

 nets. With appendix containing an in- 

 vestigation of the attraction of a gal- 

 vanic coil on a small magnetic mass, by 

 James Stuart, Esq., M.A., 158. 



■ , on a supposed alteration in the 



amount of astronomical aberration of 

 light, produced by the passage of the 

 light through a considerable thickness 

 of refracting medium, 35. 



, on a supposed periodicity in the 



elements of terrestrial magnetism, with 

 a period of 26£ days, 308. 



Alcohol, further experiments on the effect 

 of, on the elimination of nitrogen and 

 on the pulse and temperature of the 

 body, 402. 



, methylic, and water, on the specific 



heat and other physical characters of 

 mixtures of, 336. 



, on the elimination of, 107, 268. 



Aluminium, its use in blowpipe analysis, 

 472. 



Ammonia, on some properties of anhy- 

 drous liquefied, 441 . 



in xiv'me in health and disease, on, 



362. 



Analysis, quantitative, by "glasses" or 



"beads," 467. 

 Animal mechanics, on some elementary 



principles in, (V.) 328, (VI.) 330. 

 Anniversary Meeting, Nov. 30, 1871, 47. 



Arctic regions, notice of fossil plants from 

 the, 53. 



Astronomical aberration of light, on a 

 supposed alteration in the amount of, 

 35. 



Atmosphere, on the detection of organic 

 and other nitrogenized matter existing 

 in the, 442. 



Atomic weight of thallium, researches on, 

 475. 



Attraction of spheroids, note relating to 

 the, 507. 



Auditors, election of, 1 ; report of, 47. 



Australia, on the fossil mammals of: 

 Part VI. G-enus Phascolomys, 66 ; Part 

 VII. G-enus Phascolomys, species ex- 

 ceeding the existing ones in size, 306. 



Azodiamines, colouring-matters derived 

 from aromatic, 431. 



Baird (W.), obituary notice of, xxiii. 



Bakerian Lecture, on the structure and 

 development of the skull of the saknon 

 {Salmo salar), 360. 



Basevi (Capt.), decease of, 52. 



Bastian ( H.C.) on some heterogenetic modes 

 of origin of flagellated monads, fungus- 

 germs, and ciliated infusoria, 239. 



Benzylphosphine, 237. 



Birds, remarks on the sense of sight in, 

 351. 



Blood, on the physical nature of the co- 

 agulation of the, 442. 



relationship, on, 394. 



Bombay, on the lunar variations of mag- 

 netic declination at, 135. 



, the absolute direction and intensity 



of the earth's magnetic force at, 107. 



Bones, number of, found in Brixham Cave, 

 517. 



Brandy, effect of, on muscular power, 

 412. 



Brazil (H.M. Pedro II.), elected, 27, 54, 

 139. 



Brazil, letter from His Majesty the Em- 

 peror of, 139. 



