Monday, 17th January 1853. 



PAGE 



On a simplification of the Instruments employed in Geographical 

 Astronomy. By Professor C. Piazzi Smyth, . . . 161 



On the Mechanical Action of Heat, Section VI. : — A review of 

 the Fundamental Principles of the Mechanical Theory of 

 Heat ; with remarks on the Thermic Phenomena of Currents 

 of Elastic Fluids, as illustrating those Principles. By W. J. 

 Macqporn Rankink, Esq., , . . . . 162 



Donations to the Library, ..... 168 



Monday, 7th February 1853. 



1. On the Structural Characters of Rocts. By Dr Fleming, . 169 



2. Observations on the Speculations of the late Dr Brown, and of 



other recent Jletaphysicians, regarding the exercise of the 

 Senses. By Dr Alison, . . . . . 170 



Donations to the Library, ..... 172 



Monday, 21st February 1853. 



On the Summation of a Compound Series, and its application to a 



Problem in Probabilities. By the Right Rev. Bishop Terrot, 173 



Monday, 7th March 1853. 



1. On the Species of Fossil Diatomaceae found in the Infusorial 



Earth of Mull. By Professor Gregory, . . . 176 



2. On the Production of Crystalline Structure in Crystallised 



Powders, by Compression and Traction. By Sir David Brew- 

 STEK, K.H., D.C.L., F.R.S., V P.R.S. Edin., . . . 178 



D. On the Structure and Economy of Tethea, and on an undescribed 



species from the Spitzbergen Seas. By Professor Goodsir, 181 

 Donations to the Library, . . . . . 182 



Monday, 21st March 1853. 



On Circular Crystals. By Sir David Brewster, K.H., D.C.L., 



F.R.S., V.P.R.S.E., Associate of the Institute of France, 183 



Donations to the Library, . .... 188 



For continuation of Contents see p. 3 of Cover. 



