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Monday , 16^ February 1874. 
Obituary Notice of the Very Rev. Dean Ramsay. By the 
Rev. D. F. Sandford, . 289 
Obituary Notice of Professor Rankine. By Lewis D. B. 
Gordon, C.E., . . . . . 296 
Obituary Notice of Justus Liebig. By Professor Crum- 
Brown, ...... 307 
Obituary Notice of Gustav Rose. By Professor Crum- 
Brown, ...... 312 
Obituary Notice of the Rev. Professor Stevenson, D.D. By 
John Small, M.A., Librarian to the University of 
Edinburgh, ...... 314 
Obituary Notice of Auguste De la Rive. By George 
Forbes, Esq., . . . . 319 
Obituary Notice of Dr J. Lindsay Stewart. By Dr Cleg- 
horn, Stravithy, . . . . . 321 
' Obituary Notice of John Hunter. By J. T. Bottomly, 
Esq., University, Glasgow, .... 322 
The Kinetic Theory of the Dissipation of Energy. By 
Sir William Thomson, .... 325 
On the Stresses due to Compound Strains. By Professor C. 
Niven. Communicated by Professor Tait, . . 335 
Monday , 2 d March 1874. 
On the Parallel Roads of Glen Roy. By the Rev. Thomas 
Brown, F.R.S.E., . . . . . 339 
Note on the Perception of Musical Sounds. By John G. 
M‘Kendrick, M.D., . . . . 342 
On the Establishment of the Elementary Principles of 
Quaternions on an Analytical Basis. By G. Plarr, 
Esq. Communicated by Professor Tait, . . 348 
Preliminary Note “ On a New Method of obtaining very 
perfect Vactia.” By Professor P. G. Tait and Mr 
J ames Dewar, .... . 348 
Laboratory Notes. By Professor Tait— 
1. On Atmospheric Electricity, . . . 349 
2. On the Thermo-Electric Position of Sodium, . 350 
Monday , 16 th March 1874. 
On the Resistance of the Air to the Motion of Fans. By 
James C. Fairweather, Esq. Communicated by 
George Forbes, Esq. (With two Plates), 
351 
