Index. 
881 
Quaternions. — On Quaternion Inte- 
gration, by Professor Tait, 293. 
Radiolarians and Ccelenterates : Their 
Yellow Cells, 377. 
RcbmaZince Socotrenses, 458. 
Rational Fractions, The Expansion of. 
162. 
Rattray (Dr. James Clerk) elected a 
Fellow of the Society, 421. 
Refraction. — • Professor Vince’s Two 
Cases of Unusual Atmospheric Re- 
fraction, 581. 
Relationship, The Algebra of, 162 ; 
Number of Genus Relationships of 
the 7i th Order, 165. 
Renard (Prof. A.) and John Murray, 
Rocks of North Rona, Faroe, 720. 
Reophax difflugiformis , 715. 
adunccc, 715. 
sabulosa, 715. 
Resedaceas Socotrenses, 501. 
Resistance of Wires, 33. 
Rhabdammina cornutct, 714. 
Rhythm, by the Rev. J. L. Blake, 798. 
Richardson (Ralph), F.R.S.E. , Note 
on a Boulder at Loch Skene, 281. 
Report as to Boulders at Strath- 
nairn, 750. 
Rintoul (D.) and Dr. A. Macfarlane 
on the Effect of Flame on the 
Electric Discharge, 567. 
on the Effect of Moisture on 
the Electric Discharge, 801. 
Robinson (The Rev. Dr. T. R. ) con- 
tributes an Obituary Notice of Dr. 
William Lassell, 97. 
Roccellece Socotrenses, 458. 
Rocks, Order of Succession of, in the 
North-West Highlands, 815. 
Rogerson (John Johnston), A.B., 
elected a Fellow of the Society, 
233. 
Rona (Faroe).— Rocks of North Rona, 
by Professor A. Renard and John 
Murray, 720. 
Rosebery (The Right Hon. the Earl of) 
elected a Fellow of the Society, 233; 
admitted, 421. 
Rotating Mass of Fluid, Figures of 
Equilibrium of, by Sir William 
Thomson, 610. 
Rotation in Liquid Jets, by Professor 
Tait, 94. 
Rotation of the Plane of Polarisation 
by Quartz, and its relation to Wave- 
Length, by W. Peddie, 816. 
Rubiacece Socotrenses, 834. 
Rumble (Thomas Wm.), Memb. Inst. 
C. E. , elected a Fellow of the Society, 
133. 
Rutaccce Socotrenses, 505. 
Rutherford (Samuel), His Treatise 
“Lex Rex” in connection with the 
Dawn of the Constitutional Prin- 
ciple, by Lord Moncreiff, 151. 
Salmasius (Joannes), His “ Defensio 
Regia pro Carolo Primo,” in con- 
nection with the Dawn of the Con- 
stitutional Principle, by Lord Mon- 
creiff, 153. 
Salmon (Rev. Professor George) elected 
a British Honorary Fellow, 95. 
Sanders (Professor W. R.), Obituary 
Notice of, 333. 
Sanderson (James, Dep. Inspector-Gen. 
of Hospitals) contributes an Obitu- 
ary Notice of Thomas Key, 95. 
Sang (Edward), on Equidifferent Mul- 
tiples of Irrational Quantities, 2. 
on the Solar Eclipse of 31st 
December 1880, 18. 
Notice of the Solar Eclipse of 
the 17th May 1882, with Remarks 
on the Calculation, 720. 
Notice of an Easy Method for 
Determining the Position of the Prin- 
cipal Focus of an Object Glass, 50. 
Moves an Addition to Law 
XIV. ‘ ‘ That when there are five 
Mondays in January, meetings shall 
be held on the 3rd and 5th Mon- 
days of that month,” 421 ; His 
Motion Adopted, and Law XIV. 
Amended accordingly, 567. 
A Critical Examination of Two 
Cases of Unusual Atmospheric Re- 
fraction, described by Professor 
Vince, 581. 
Sapindaccce Socotrenses, 507. 
Schultze (Dr. F. E.) on the Structure 
of Euplectella, 2. 
Schweinfurth (Dr.), Liclienes Soco- 
trenses, 457. 
Scorpions, New Fossil, byB. N. Peach, 
245. 
Scott (Alexander), Fungi et Algse in 
Insula Socotra, 456. 
Sea Water : Its Absorption, by John 
Aitlcen, 637. 
Gas Contents of Water of 
Faroe Channel, by Prof. Dittmar, 
718. 
Secondary Cell. — Some Experiments 
on a New Secondary Cell, by A. P. 
Lawrie, B.Sc., 724. 
Selenium Cell, A Simple Form of, by 
Professor James Blyth, 119. 
Serpentine: Its Formation from Dolo- 
mite, by Dr. J. J. Dobbie, and G. 
G. Henderson, B.Sc., 606. 
