CONTENTS. 
PAGE 
Election of Office-Bearers, . . . . . 1 
Introductory Address by the President, . . . .2 
Om the Distribution of Energy between colliding Groups of Mole- 
cules. By Sir W. Thomson, . . . . .2 
On the Dynamics of Deflection and Refraction in the Wave Theory 
of Light. By the Same, . . . . . .2 
On Kerr’s Discovery regarding the Reflection of Light from a Mag- 
netic Pole. By the Same, . . . . . .2 
On an Improved Method of Measuring Compressibility. By Pro- 
fessor Tait, 2 
On the Theory of the Tides. Part I. By Edward Sang, LL.D., . 4 
On the Nature and Significance of the Structure known as Kupffer’s 
Vesicle in Teleostean Embryos. By Mr J. T. Cunningham, 
B.A., 4 
The Relations of the Alveolar form of Cleft Palate to the Incisor 
Teeth and the Intermaxillary Bones. By Professor Turner, M.B., 
F.R.S., 15 
Apparent Lines of Force on passing a Current through Water. By 
Thomas Andrews, F.R.S.E., F.C.S., Wortley Iron Works, near 
Sheffield, . . . . . . . .18 
A Proof that the Mean Square Relative Velocity of Two Points 
whose Velocities are jp and q is p 2 + q 2 . By Professor Tait, . 21 
Note on a Theorem of Clerk-Maxwell. By Professor Tait, . . 21 
Extraordinary Occurrence at House No. 7 York Place, . . 23 
Remarkable Sunrises on December 6th, 8th, and 11th, 1884. 
Described by W. E. MTntosh, Esq. ; Lady Mary Baillie of Pol- 
kemmet ; and Patrick Dudgeon, Esq., . . . .24 
Anatomy and Physiology of Patella vulgata . Part I. Anatomy. 
By R. J. Harvey Gibson, M.A. Communicated by Professor 
Herdman, D.Sc., . . . . . . .26 
A Theory of Solution. By W. W. J. Nicol, M.A., B.Sc., . . 27 
On the Salinity of the Water in the Firth of Forth. By Hugh 
Robert Mill, B.Sc., F.C.S., Scottish Marine Station, Granton, 
Edinburgh, . . . . . . . .29 
Notes on the Chemical Composition of the Cobalt and Nickel 
Ores of New Caledonia, with some Remarks on the Properties and 
