772 
Index. 
Comets, by Professor George Forbes, 
426. 
Compressibility of Glass, by J. Y. 
Buchanan, 697. 
Conder (Lieut. Claude Reignier), Trigo- 
nometrical Survey of Palestine, 379. 
on the Topography of Jerusalem, 
474. 
Contact Electricity, 362. 
Coral Reefs and Islands, — their Origin 
and Structure, by John Murray, 505 ; 
Darwin’s Theory, 505 ; Professor 
Semper’s Difficulties in Applying 
Darwin’s Theory, 506 ; Nature of 
Oceanic Islands and Submarine Eleva- 
tions, 506 ; Pelagic Fauna and Flora 
of Tropical Regions, 507 ; Bathyme- 
trical Distribution of the Calcareous 
Shells and Skeletons of Surface Or- 
ganisms, 509 ; Coral Atolls, 510 ; 
Barrier Reefs, 513 ; Elevation and 
Subsidence, 515 ; Summary, 517. 
Corella, a genus of Ascidiadse (“Chal- 
lenger” Expedition), 459 ; Corella 
Japonica, n. sp., 472, 716, 718. 
ouncil for Session 1878-79, 1 ; for 
Session 1879-80, 315. 
Council of the Society — its Constitution, 
408 ; the Council to have power to 
Regulate the Private Business of the 
Society, 408 ; Chairman of Council to 
have a Casting as well as a Delibera- 
tive Vote, 408. 
Coxe (Sir James), Obituary Notice of, 
15. 
Craig (Sir William Gibson), Obituary 
Notice of, 24. 
Croll (Mr), Notes on Striseand Boulders 
of the Pentlands, 192. 
Crustacea (New) from the Cementstone 
Group of the Sandstone of Eskdale 
and Liddesdale, by B. N. Peach, 
711. 
Cryophorus. — On a Sulphurous Acid 
Cryophorus, by Sir William Thomson, 
442. 
Crystalline Compound formed in Water 
containing Sulphuretted Hydrogen 
and Mercaptan, 87. 
Crystalline Rocks of Firth of Forth, 66. 
Cunningham (James), W.S., Obituary 
Notice of, 13. 
Cynthiadse, 458. 
Dallas (W. Elmslie), Obituary Notice 
of, 340. 
Darwin (Dr Charles). — His Theory of 
Origin of Coral Reefs, 505. 
Deep-Sea Thermometers, by J. Y. 
Buchanan, 77. 
Defect of any Rectilineal Figure, 647 ; 
Defect of a Triangle Proportional to 
its Area, 648. 
Definite Integrals, 271. 
Delessite, 77. 
Diethylmethyl-sulphine, 254. 
Differential Telephone. See Telephone. 
Differential Thermoscope, 537. 
Differential Steam-Pressure Thermo- 
meter, 535. 
Disruptive Discharge of Electricity, by 
Dr Alex. Macfarlane and P. M. Play- 
fair, 50. 
Dithionate of Trimethyl-sulphine, 54. 
Dome of the Rock at Jerusalem, 481. 
Donaldson (Dr) on Professor Geddes’s 
Theory of the Iliad, 105. 
Donations to the Library, 735. 
Donders (Frank Cornelius) Elected an 
Honorary Fellow, 92. 
Dove (Heinrich Wilhelm), Obituary 
Notice of, 356. 
Duboisia Hopwoodii , 201. 
Dudgeon (Patrick), of Cargen, exhibits 
Auriferous Quartz from Leadhills Dis- 
trict, 67. 
Ecteinascidia, n. g., 721 ; Ecteinascidia 
fusca, n. sp., 723 ; Ecteinascidia tur- 
binata , 724. 
Edinburgh Churchyards, Rock- Weather- 
ing in, by Professor Geikie, 518. 
Election of Office-Bearers for Session 
1878-79, 1 ; for Session 1879-80, 
315. 
Electric Currents produced by Friction 
between Conducting Substances, by 
James Blyth, 548. 
Discharge between a Point and 
a Plate, and between a Ball and a 
Plate, by Dr A. Macfarlane, 555. 
Resistance ; its Variation with 
Temperature in the case of Alloys, by 
Professor M‘Gregor and Dr Knott, 
714. 
Electrical Contact, the Transmission of 
Sound by Loose, 272. 
Electricity, Disruptive Discharge of, by 
Dr A. Macfarlane and P. M. Play- 
fair, 50. 
Passage of Spark between Equal 
Spherical Balls, 50 ; between Plate 
and Ball, 50 ; between Plate and 
Point, 50. 
Discharge through a Solid 
Dielectric, 50. 
Discharge of Electricity through 
Olive Oil, 727. 
Researches on Contact Elec- 
tricity, by Dr C. G. Knott, 362. 
