INDEX to VOL. XXT. 



ixIE and steam, on the condensation of 

 a mixture of, upon cold surfaces, 275. 



Air-battery, on an, 247. 



Airy (Sir Gr. B.), magnetical observations 

 in the Britannia and Conway tubular 

 iron bridges, 85. 



, additional note to the paper "on a 



supposed alteration in the amount of 

 astronomical aberration of light pro- 

 duced by the passage of the light 

 through a considerable thickness of re- 

 fracting medium, 121. 



Airy (H.) on leaf-arrangement, 176. 



Aitken (Dr.), admitted, 499. 



Alcohol, on normal primary heptyl, 393. 



Allen (R.), account of a meteor that fell 

 on the " Seven Stones " lightship, 122. 



Alloys, on the quantitative analysis of 

 certain, by means of the spectroscope, 

 507. 



Amblygonite, on a new locality of, 174. 



Amides and nitriles, new method for pro- 

 ducing, 61. 



Ammonia, on some properties of anhy- 

 drous liquefied, 140. 



, on the direct synthesis of, 281. 



nitrate, on the union of, with am- 

 monia, 109. 



Amphipod crustaceans, on a new genus 

 of; 206. 



Anderson (T.), Royal medal awarded to, 

 31. 



Angstrom (A. J.), Rumford medal awarded 

 to, 31. 



Aniline, transformation of, into toluidine, 

 54. 



Annelids, contributions to the study of 

 the errant, of the older palasozoic rocks, 

 288. 



Anniversary Meeting, Nov. 30, 1872, 21. 

 Annual Meeting for election of Fellows, 



June 12, 1873, 348. 

 Arctic Sea, temperature of the, in the 



neighbourhood of Spitzbergen, 91. 

 Armstrong (Sir A.), admitted, 348. 

 Astronomical aberration of light, on a 

 YOL. XXI. 



supposed alteration in the amount of, 

 121. 



Auditors, election of, 1, 495; Report of, 

 21. 



Australia, on the fossil mammals of : 

 Part VIII. Family Macropodidce, ge- 

 nera Macropus, Osphranter, Phasco- 

 lagus, Sthenurus, and Protemnodon, 

 128; Part IX. Family Macropodidce, 

 genera Macropus, Pachysiagon, Lepto- 

 siagon, Procoptodon, and Palorchestcs, 

 386. 



Azodiamines, colouring - matters derived 

 from aromatic, 56. 



Bacteria, note on the origin of, and on 

 their relation to the process of putre- 

 faction, 129. 



, on the development of, in organic 



infusions, 349. 



, Vibriones, and their germs, on the 



temperature, necessary to kill, 224, 325. 



Bakerian Lecture, on the radiation of heat 

 from the moon, the law of its absorp- 

 tion by our atmosphere, and the varia- 

 tion in amount with her phases, 241. 



Ball (R. S.), admitted, 348. 



, researches in the dynamics of a 



rigid body by the aid of the theory of 

 screws, 385. 



Barometric pressure at Bombay, on the 

 diurnal variations of the, 384. 



Bastian (H. C), note on the origin of 

 Bacteria, and on their relation to the 

 process of putrefaction, 129. 



, on the temperature at which Bac- 

 teria, Vibriones, and their supposed 

 germs are killed when immersed in 

 fluids or exposed to heat in a moist 

 state, 224, 325. 



Beaumont (E. B.) and Royston-Pigott 

 (Dr.), note on high-power definition, 

 as illustrated by a compressed Podura- 

 scale, 422. 



Belgium, magnetic survey of, in 1871, 

 165. 



2 T 



