CONTENTS. T 



Page 

 Feb. 29.— Phofessou Wm. Thomson— On the Origin and 



Transformations of Motive Power . .199 



March 3.— General Monthly Meeting .... 205 

 „ 7. — Sir Charles Lyell — On the Successive Changes 



of the Temple of Serapis . . . .207 



„ 14. — Rev. John Barlow — On Aluminium . . 215 



April 4. — Henry E. Roscoe, Esq. — On the Measurement 



of the Chemical Action of Light . . . 223 



„ 7. — General Monthly Meeting .... 225 

 „ 11. — C. W. Siemens, Esq.— On a Regenerative Steam- 



Engipe 227 



„ 18. — Dr. H. Bence Jones — On Ventilation, and the 



means of determining its amount . . . 236 



„ 21. — Dr. Humphry Sandwith — On the Siege of Kars 246 

 „ 25. — W. B. Donne, Esq. — On the works of Chaucer, 

 considered as Historical Illustrations of England 

 in the 14th century ..... 248 



May 1. — Annual Meeting ...... 254 



„ 2. — Professor Owen — On the Ruminant Quadrupeds 



and the Aboriginal Cattle of Britain . . 256 



„ 5. — General Monthly Meeting .... 261 



„ 9. — Henry Bradbury, Esq. — On the Security and 



Manufacture of Bank Notes . . . 263 



„ 16. — Dr. a. W. Hofmann — On the Chemical Type 



Ammonia ...... 274 



„ 23. — F. A. Abel, Esq. — On some of the Applications 



of Chemistry to Military purposes . . 283 



„ 30. — Dr. Lyon Playfaib — On th€ Chemical Prin- 

 ciples involved in Agricultural Experiments , 289 

 June 2. — General Monthly Meeting .... 293 



„ 6. — Professor Tyndall — Comparative view of the 



Cleavage of Crystals and Slate Rocks . . 295 



June 13. — Professor Faraday — On M. Petitjean's process 

 for Silvering Glass : and some Observations on 



Divided Gold 308 



July 7. — General Monthly Meeting . . . .313 



Nov. 3.— General Monthly Meeting .... 315 

 Dec. 1. — General Monthly Meeting . . , .318 



