Contents. 
v 
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Note on a Singular Problem in Kinetics. By Professor Tait, . 173 
The Earthquake of 28th November 1880 in Scotland and Ireland. 
By Charles Alexander Stevenson, B.Sc. Edin. Communicated by 
Professor Geikie (Plate Ice-.), j . . . . .176 
On the Classification of Statistics. Part I. By Mr P. Geddes, . 187 
On Professor Cayley’s Theorem regarding a Bordered Skew Deter- 
minant. By Mr Thomas Muir, M.A., . . . .187 
The Law of Extensible Minors in Determinants. By Mr Thomas 
Muir, M.A., . . . . . . .187 
Additional Note on a Problem of Arrangement. By Mr Thomas 
Muir, M.A., ....... 187 
On the Oxidation of Ferrous Salts. By Mr J. Y. Buchanan, . 191 
On some Space-Loci. By Professor Tait, . . . .197 
On the Pressure-Errors of the “ Challenger ” Thermometers. By 
Professor Tait, . . . . . .199 
The Action of Heat on Tliioformanilid. By W. W. J. Nicol, M.A., 199 
On the Classification of Statistics. Part II. By Mr P. Geddes, . 202 
On Galvanic Polarisation. By Professor Helmholtz, . . 202 
On the Average Pressure due to Impulse of Vortex Bings on a Solid. 
By Sir William Thomson, ...... 204 
On the Crushing of Glass by Pressure. By Professor Tait, . . 204 
On the Cause of the Sounds produced in the Microphone Keceiver. 
By Professor Janies Blyth, ...... 206 
On the Classification of Statistics. Part III. Besults. By Mr 
Geddes, ........ 209 
On the Motion of a Storm in an Easterly Direction being only 
possible as a Circular Atmospheric Wave. By Kobert Tennant, 209 
On Chemical Nomenclature and Notation. By Professor Crum 
Brown, . . . . . . . .211 
Note on a Phoronis dredged in H.M.S. “ Challenger.” By W. C. 
MTntosh, . . . . . . . .211 
Additional Besearches on the Structure of the Palceoniscidce and 
. Platysomidce. By Dr B. H. Traquair, . . . .217 
Note on the Heating produced by Compression. By Professor 
Tait, . . . . . . . .217 
On the Structure of the Skeleton of Tubiporct musica , and on the 
Belation of the Genus Tubipora to Syringopora. By Professor H. 
Alleyne Nicholson, M.D., D.Sc., . .... 219 
On an Iodine Battery. By Mr A. P. Laurie. Communicated by 
Professor Tait, ....... 230 
Note on Chemical Affinity and Atomicity. By William Durham, 231 
On the Physical and Biological Conditions of the Channel between 
Scotland and the Faro Islands. By Sir C. Wyville Thomson, . 233 
On a Class of Sturmian Functions. By Professor Chrystal, . 233 
Preliminary Beport on the Tunicata of the “ Challenger ” Expedi- 
tion. Part IY. By W. A. Herdman, D.Sc., . . . 233 
On Comenic Acid. By D. B. Dott. Communicated by Professor 
Crum Brown, , ..... 241 
