VI 
Contents. 
PAGE 
On Morgan’s Systems of Consanguinity and Affinity. By Dr 
Macfarlane, ........ 245 
Note on a Proposition in the Theory of Numbers. By Professor 
Tait, ........ 245 
An Address on the Island of Socotra. By Professor I. Bayley 
Balfour, ........ 245 
On some new species of Fossil Scorpions from the Carboniferous 
Rocks of Scotland and the English Borders, with a Review of the 
genera Eoscorpius and Mazonia of Messrs Meek and Worthen. 
By B. N. Peach, . . . . . . 245 
Report of the Boulder Committee, with Remarks by the Convener, 
Mr D. Milne Home. (Plates I., II., III.), .... 246 
On the Compression of Gases by High Pressures. By Professor 
Tait, . . . . . . . .293 
Determination of Longitude without a Chronometer. By Dr 
Menzies. Communicated by Professor Tait, . . . 293 
Electric Discharge through Colza Oil. By A. Macfarlane, M.A., 
D.Sc., F.R.S.E., . . . . . . .293 
On Quaternion Integration. By Professor Tait, . . . 293 
Chairman’s Concluding Remarks at the Close of the Session, . 293 
On the Classification of Statistics and its Results. By Patrick 
Geddes, F.R.S.E., ....... 295 
Election of Office-Bearers, ...... 323 
Obituary Notices of Dr John Hill Burton, Rev. Dr Cumming, 
Dr P. D. Handyside, Professor Sanders, Dr Andrew Wood, . 324 
On a Particular Case of the Symbolic Cubic. By Dr Gustav 
Plarr. Communicated by Professor Tait, .... 342 
On Mirage. By Professor Tait, . . . . .354 
Macdougall-Brisbane Prize, ..... 361 
On the Application of the Rocks of Ben Nevis to Ornamental Art. 
By Sir R. Christison, Bart., Hon. V.P., .... 365 
On the State of Carbon in Iron and Steel : a New Hypothesis of the 
Hardening of Steel. By R. Sydney Marsden, D.Sc., F.R.S.E., &c., 368 
Some Physical Experiments bearing upon the Circulation of the 
Blood-Corpuscles. By D. J. Hamilton, M.B., F.R.Q.S.E., 
F.R.S.E., 370 
On the Nature and Functions of the “ Yellow Cells ” of Radio- 
larians and Ccelenterates. By Patrick Geddes, . * .377 
On the Thermodynamic Acceleration of the Earth’s Rotation. By 
Sir William Thomson, . . . . . . 396 
Notes on a Cist discovered at Parkhill, Dyce, Aberdeenshire, in 
October 1881. By William Ferguson of Kinmundy. With 
Notes on the Bones by Dr Fife Jamieson, M.B., . . . 405 
On a Class of Permanent Symmetric Functions. By Thomas Muir, 
M.A., . . 409 
Optical Notes. By Professor Tait, . . . . .418 
The Historic Evidence for the Destruction of Pompeii and Hercu- 
laneum. By the Rev. Dr Cazenove, . . . .421 
