266 



Index 



Araucaria, a new species of, on an 

 island near New Caledonia, 153 ; 

 insulated habits of its species, 



154- 



Arc of meridian, progress of mea- 

 surement in Europe, 157. 



Arctocephalus Hookeri, large seal 

 from Southern Ocean obtained by 

 Zoological Society, 174. 



Ardennes, marble block from, con- 

 taining part of a Cephalaspis, 

 166. 



Argentine, discovery of a Glossop- 

 teris flora in, 247. 



Arithmetic, a new method of, 244. 



Armstrong, Sir W., election of, and 

 biographical note on, 61 ; de- 

 scribes Captain Noble's machine 

 to measure velocity of a projec- 

 tile, 182 ; swinging bridge con- 

 structed by, 194 ; suggestion by, 

 220 ; resignation of, 75. 



Armstrong's guns, experiments with, 

 142, 143. 



Aromatic plants of North-west 

 India, described by Arrian, 109. 



Arran, Isle of, discovery of a 

 Tertiary volcanic neck, 257. 



Arrian, on aromatic plants found by 

 Alexander's army, 109. 



Arsenic, in river water, explanation 

 of its presence, 185. 



Arsenical dyes, poisonous effects of, 

 204 ; in glazed paper, id. 



Asiatic (Royal) Society, 30. 



Assyria, new discoveries of sculp- 

 tures in, 112. 



Astronomical purposes, use of da- 

 guerrotype for, 112, 113, 117; 

 photography applied to, 124. 



Astronomical Society, 27, 30. 



Atlantic, nature of sea-bed in the 

 North, 152 ; distribution of life 

 on it, id. 



Atlas, The, vegetation of its main 

 chain entirely Spanish, 188. 



Atmosphere, waves and currents in 

 the, 117; pressure of, at differ- 

 ent elevations, id. ; obstruction 

 offered by its strata to passage of 

 sounds, 193. 



Atmospheric agents, effect of, on 

 plants, 113. 



Attraction meter, Dr. Siemens', its 

 principle explained, 198, 199. 



Aurora borealis in United States, 

 effect on telegraph wires, 151. 



Australia, exploration of, 122 ; 

 expeditions starting from Ade- 

 laide, 153. 



Australian marsupial, a new form 

 of, described, 240. 



Avanturine, specimen of, from Paris, 

 178. 



Avebury, Lord, see Lubbock, Sir J. 



Babbage, Charles, remarks on brain 

 of the late, 188. 



Bacteria in Thames water, the con- 

 ditions of their occurrence, 246. 



Baker, S. W., proposed journey in 

 South-east Africa, 138 ; explores 

 Lake Albert Nyanza, 172. 



Balaenoptera, account of one 

 stranded near Portsmouth, 184. 



Balfour, F. M., election of, 77, and 

 biographical note on, 78 ; killed 

 in the Alps with his guide, 221. 



Ball, J., election of, and biographical 

 note on, 68 ; communications 

 from, 214, 230, 235 ; death of, 84. 



Balloon, invention of the Mont- 

 golfier, 131 ; use of a, for meteoro- 

 logical observation, 1 20, 1 59 ; as- 

 cent in a, to a great height, 165. 



Balls of plant fibres found near 

 Villa Franca, 161. 



Barometer, general uniformity in 

 readings in India, 105 ; move- 

 ments of the, and rain, 121 ; high 

 readings of, in London, 173, 174. 



Barometers, large tubes for, 121. 



Barrande, J., communication on 

 trilobites, 108 ; biographical note 

 on, id. 



Barrington, bones of extinct mam- 

 mals discovered at, 242. 



Barrow at Youngsbury, notes on 

 its contents, 237. 



Barth, H., visit of, to Timbuctoo, 



135- 



Basques, former extension over 

 Spain of a race resembling the, 

 172. 



Bathometer, Dr. Siemens', its prin- 

 ciple explained, 198. 



