INDEX 
Aborigines of the Andaman Islands, by 
Surgeon E. S. Brander, M.B., 415 
Abyssascidia, a new genus of Asci- 
diadae (“Challenger” Expedition), 
459, 470. 
Abyssascidia Wyvilli, 470. 
Adie (Alexander James), Obituary 
Notice of, 329. 
Aitken (John), a new variety of Ocular 
Spectrum, 40. 
Experiments with Botating 
Discs, 102. 
on the Distribution of Tempera- 
ture under the Ice in Frozen Lakes, 
409. 
Akroyd (William) on the Action of Light 
on the Iris, 37. 
Alca impennis. See Auk (Great). 
Algebra. — Principles of Logical Algebra, 
by Dr Alexander Macfarlane, Part I., 
44. Part II., 61. Part III., Appli- 
cation to certain Problems in the 
Theory of Probability, 105. 
Alternants, by Thomas Muir, M.A., 
102 . 
Andaman Islands, their Aborigines, by 
Surgeon E. S. Brander, M.B. , 415. 
Anderson (Robert) and Hannay (J. B.) 
on the Expansion of Cast Iron while 
Solidifying, 359. 
Anomalies. — Description of New As- 
tronomical Tables for the Computa- 
tion of Anomalies, by Edward Sang, 
726. 
Aplidium pedunculatum, 721. 
Arrangements. — On a Problem in Ar- 
rangements, by Professor Tait, 400. 
Arteries. — Elasticity of their Walls, by 
Dr Roy, 68. 
Ascidia (Forbesii), 458 ; Ascidia (Linn), 
459 ; Ascidia mentula (O. F. Muller), 
465 ; Ascidia meridionalis , n. sp., 
465 ; Ascidia vasculosa, 465 ; Ascidia 
nigra (Savigny), 466 ; Ascidia trans- 
lucida, 466 ; Ascidia tenera , 467 ; 
Ascidia pyriformis, n. sp., 468 ; and 
Ascidia falcigera , 469. 
Ascidia clavata , Ascidia intestinalis t 
Ascidia lepadiformis, 717. 
Ascidia cylindracea , 714. 
Ascidia despecta, 715. 
Ascidia nigra, 715. 
A scidia pyriformis , 715. 
Ascidia placenta, 715. 
Ascidiadse, of “Challenger” Expedition, 
458, 714, 716. 
Astronomical Tables for the Computa- 
tion of Anomalies, Description of, by 
Edward Sang, 726. 
Atmosphere, Weight of the Mass of, 
212 . 
Auk (Great) Two Unrecorded Eggs of, 
with Remarks on its former existence 
in Newfoundland, by Robert Gray, 
668 . 
Auriferous Quartz from Leadhills Dis- 
trict, exhibited by Patrick Dudgeon, 
67. 
Balfour (Dr John Hutton). — The Society 
acknowledges his Services as General 
Secretary, 408. He thanks the So- 
ciety for their Recognition of his Ser- 
vices, 408. 
Barometer. — Why the Barometer does 
not always Indicate the Real Weight 
of the Mass of the Atmosphere Aloft, 
by Robert Tennent, 212. 
Remarkable Fall of, during 
Hurricane at Edinburgh, 501. 
Barometric Depressions. — Proposed 
Theory of their Movement, by Robert 
Tennent, 280. 
Barra, Description of Big Boulder in, 
177. 
Bars, Law of Cooling of, by Professor 
Tait, 55. 
Basking Shark, 457. 
