Monday, 3d March 1856. 



PAG i: 

 Observations on the Diatomaccous Sand of Glenshira. Part 

 II. Containing an Account of a number of additional 

 undescribed Species. By William Gregory, M.D., 

 F.R.S.E., Professor of Chemistry in the University of 

 Edinburgh, ..... 358 



Theory of the Free Vibration of a Linear Series of Elastic 



Bodies. Part II. By Edward Sang, Esq., . 360 



Monday, 17 th March 1856. 



An Account of some Experiments on certain Sea- Weeds of 

 an Edible kind. By John Davy, M.D., F.R.S., Lond. 

 and Edin., &c., .... 363 



On the Deflection of the Plumb-Line at Arthur's Seat, and 

 on the Mean Density of the Earth. By Lieutenant- 

 Colonel James, R.E. Communicated by Professor 

 Forbes, ..... 364 



On the Possibility of combining two or more independent 

 Probabilities of the same Event, so as to form one de- " 

 finite Probability. By Bishop Terrot, . 366 



Donations to the Library, . . . . 367 



Monday, 7th April 1856. 



On Atmospheric Manoscopy, or on the direct Determi- 

 nation of the Weight of a given bulk of Air with 

 I'eference to Meteorological Phenomena in general, 

 and to the Etiology of Epidemic Diseases. By Dr 

 Seller, ..... 368 



llesearches on Chinoline and its Homologues. By C. Gre- 

 ville Williams. Communicated by Dr T. Ander- 

 son, ...... 370 



On Fermat's Theorem. By H.Fox Talbot, Esq., FJI.S., 371 



