Index. 
xxvii 
tension of the Powers of Quaternion 
Differentiation, 98. 
MTntosh (Professor W. C.). Addi- 
tional Observations on tlie Develop- 
ment and Life-Histories of the 
Marine Food Fishes, and the Distri- 
bution of their Ova, 268. 
Maclagan, Sir Douglas, President, 
delivers Opening Address of Session 
1890-91, 2. 
M‘Laren, the Hon. Lord. Equation 
of the Glissette of the Two- term 
Oval — + -f-= 1 and Cognate 
a n b n 
Curves, 83. 
Magnetisation (Longitudinal and Cir- 
‘ cular) in Iron and Nickel Wires 
(second note), by Professor Cargill 
G. Knott, 124. 
Magnetisation, Effect of, on the 
Interior Volume of Iron and Nickel 
Tubes, by Professor Cargill G. 
Knott, 315. 
Magnetism and Twist, Relations be- 
tween, Parts II. and III., by Cargill 
G. Knott, 317. 
Manganese Deposits in Marine Muds, 
• by Robert Irvine, F.C.S., and John 
Gibson, Ph.D., 54 ; Hydrated Pro- 
toxide of Manganese, 56 ; Carbonate 
of Manganese, 56 ; Sulphide of 
Manganese, 57. 
Marine Muds. Sulphur in Marine 
Muds and Nodules, and its bearing 
on their Mode of Formation, by 
J. Y. Buchanan, 17. 
Manganese Deposits in Marine 
Muds, by Robert Irvine, F.C.S., 
and John Gibson, Ph.D., 54. 
Marshall (Hugh), D.Sc. Note on 
Potassium Persulphate, 63. 
Marshall ( W illiam). Obituary N otice 
of Professor C. J. Burton, xxi. 
Mediterranean. On the Composition 
of some Deep-Sea Deposits from the 
Mediterranean, by J. Y. Buchanan, 
F.R.SS. L. & E., 131. 
Meetings of the Society during Session 
1890-91, 341. 
Milne Home (David). See Home 
(David Milne). 
Monaco, the Prince of. A New Ship 
for the Study of the Sea, 295. 
Moncreiff (Rt. Hon. Lord). Obituary 
Notice of Prof. Campbell Swinton, i. 
Muir (Thomas), LL. D. On some 
hitherto Unproved Theorems in 
Determinants, 73. 
Muller’s Topknot, 268. 
Murray (John), LL.D. On the Tem- 
perature of the Salt and Fresh 
Water Lochs of the West of Scot- 
land, at , Different Depths and 
Seasons, during the Years 1887 and; 
1888, 139. 
Murray (John), LL.D., and Irvine 
(Robert). On Silica and the Sili- 
ceous Remains of Organisms ini 
Modern Seas, 229. 
Nickel and Iron Wires, the Interac- 
tion of Longitudinal and Circular 
Magnetisation in, by Professor Car- 
gill G. Knott, 124. 
Nickel and Iron Tubes, Effect of 
Longitudinal Magnetisation on the 
Interior Volume of, by Professor Car- 
gill G. Knott, 315. 
Nicol’s Polarising Eye-Piece. See 
Sang (Edward), LL.D. 
Obituary Notices— 
Swinton (Professor Campbell), i. 
Leslie (James), xvii. 
Burton (Professor Cosmo Innes), xxi* 
OfficerBearers, Election of, 1. 
Ova of Marine Food Fishes. See 
MTntosh (Professor W. C. ). 
Oval (Two-term) and other Curves. 
See McLaren (Hon. Lord). 
Papers, Titles of, read during Session 
1890-91, 341. 
Persulphate (of Potassium). See Po- 
tassium. 
Polarising Eye-Piece (Nicol’s). See 
Sang (Edward), LL.D. 
Potassium Persulphate, by Hugh Mar- 
shall, D.Sc., 63. 
“ Princesse Alice,” a new Ship for the 
Study of the Sea, 299. 
Quaternion Differentiation, Proposed 
Extension of the Powers of. By 
Alexander M £ Aulay, 98. 
Sang (Edward), LL. D. , Investigation 
of the Action of Nicol’s Polarising 
Eye-Piece, 323. 
Note on the above Paper by 
Prof. Tait, 337. 
On the Extension ofBrouncker’s 
Method to the Comparison of several 
Magnitudes, 341. 
Scott (Sir Walter). Recently recovered 
Letter of, resigning Presidentship, 
14. 
Sea. A New Ship for the Study of 
the Sea. By the Prince of Monaco, 
295. 
Sellar (Prof. W. Y.), deceased, Notice 
of in President’s Address, 10. 
