Index. 775 
Placentation of the Cetacea (Monodon 
Monoceros), by Prof. Turner, 103. 
Plarr (Gustav) on the Roots of the 
Equation V pcpp, 237. 
Addition to Paper on Princi- 
ples of Quaternions, 402. 
Playfair (P. M.) on the Disruptive 
Discharge of Electricity, 721. 
Polyodon Gladius, Anatomy of, by Dr 
P. D. Handyside, 660. 
Potentials required for Sparks of a 
Holtz Machine, by Alex. Macfarlane, 
170, 332. 
Powders — On the Effect of Heat on 
Infusible Palpable Powders, by Pro- 
fessor Tait, 298. 
Precautions in using and recording 
Original Computations, by E. Sang, 
349. 
Prevost (Dr E. W.) on Ammonia- 
Cupric Zinc Chloride, 302. 
Prizes. — Makdougall-Brisbane Prize, 
presented to Alexander Buchan, 
M.A., 319. 
Neill Prize, presented to Dr 
Traquair. 
Progressive Movement of Barometric 
Depressions or Storms, by Mr 
Robert Tennent, 570. 
Proportions. — Can the Law of Mul- 
tiple Proportions be Demonstrated 
from Analytical Data? by W. 
Dittmar, 536. 
Quartz, Specimen of Auriferous, 338. 
— — — Refractive Index of, 567. 
Auriferous, of Wanlockhead, 
579. 
Quaternions, addition to Paper “ On 
the Establishment of the Element- 
ary Principles of,” by G. Plarr, 402. 
Quincke (Professor) on the Refractive 
Indexes of Glass and Quartz, as 
tested by Reflection from the Sur- 
face, 567. 
Remusat (Charles, Comte de), Obitu- 
ary Notice of, 4. 
Rhizodopsis, The Cranial Osteology 
of, by Dr R. H. Traquair, 403, 444, 
658. 
Rhizodus, The Structure of, by Dr R. 
H. Traquair, 403, 444, 657. 
On the genus Rhizodus, 657. 
Hibberti, 658. 
■ Ornatus, 659. 
Rhombohedral Carbonates, by Pro- 
fessor Heddle, 144. 
Rigidity produced by Centrifugal 
Force, 73. 
Robinson (G. Carr) on the Solid 
Fatty Acids of Cocoa-nut Oil, 537. 
on the Crystallisation of Iso- 
morphous Salts, 732. 
New Method for Separation of 
Yttrium and Erbium from Cerium, 
Lanthanum, and Didymium, 734. 
on Some New Bases of the 
Leucoline Series, 732. 
Rosevelt (H. E.), Letter as to the 
Phonograph, 548. 
Rotation (Diamagnetic), by Professor 
George Forbes, M.A., 85. 
Ruff (Machetes Pugnax), by Professor 
Duns, 272. 
Russel (Alex.), Obituary Notice of, 219. 
Rutherford (Professor) on the Biliary 
Secretion, with Reference to the 
Action of Cholagogues, 334, 718. 
Salmon, Fungus Disease affecting, 726. 
Salt, Note on the Flame produced by 
putting Common Salt into a Fire, 
by C. Michie Smith, 133. 
Salts (Isomorphous), The Crystallisa- 
tion of, 732. 
Sang (Edward) on the Curves pro- 
duced by Reflection from a Polished 
Revolving Wire, 302. 
on the Construction of a 
Canon of Sines for Decimal Divi- 
sion of Quadrant, 343. 
on Precautions in Recording 
and Using Records of Original 
Computations, 349. 
Toothing of Unround Disks 
intended torollupon each other, 393. 
Canon of Sines for each 
2000th Part of the Quadrant to 33 
Places, and True to the 30th 
Figure, 536. 
on the Tabulation of All 
Fractions whose Values are be- 
tween Two Prescribed Limits, 536. 
on Arrangement of Tables of 
Ballistic Curves, and their Applica- 
tion to Gunnery, 637. 
Saprolegnia, affecting Salmon, 730. 
Sea-Water, The Air Dissolved in, by 
J. Y. Buchanan, 412. 
Compressibility of, by J. Y. 
Buchanan, 565. 
See Ocean -Water. 
Series. — Transformation of Infinite 
Series into Continued Fractions, by 
Thomas Muir, M.A., 117. 
