Ill 



Monday ^ 3<i March 1856. 



PAGK 



Observations on tlie Diatomaceous Sand of Glenshira. Part 

 II. Containing an Account of a number of additional 

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

 F.E.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^ 17th March 1856. 



An Account of some Experiments on certain Sea- Weeds of 

 an Edible kind. By John Davy, M.D., F.B.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, 1th April 1856. 



On Atmospheric Manoscopy, or on the direct Determi- 

 nation of the Weight of a given bulk of Air with 

 reference to Meteorological Phenomena in general, 

 and to the Etiology of Epidemic Diseases. By Dr 

 Seller, . . . . . 368 



Researches 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., F.R.S., 371 



