Monday, \Qth April 1855. 



PAGE 



Notice of Some new Forms of British Fresh-Water Diato- 

 macese. By William Gregory, M.D., Professor of 

 Chemistry, ..... 306 



On Glacial Phenomena in Peebles and Selkirk Shires. By 

 Robert Chambers, Esq., &c., . . 308 



Pieliminary Notice on the Decompositions of the Platinum 

 Salts of the Organic Alkalies. By Thomas Anderson, 

 M.D., Regius Professor of Chemistry in the University 

 of Glasgow, . . . . . 309 



On the Volatile Bases produced by Destructive Distillation 

 of Cinchonine. By C, Greville Williams, Assistant 

 to Professor Ander.son, Glasgow University, 314 



Monday, dOth April 1856. 



Remarks on the Coal Plant termed Stigmaria. By the Rev. 



Dr Fleming, . . . . .316 



On Errors caused by Imperfect Inversion of the Magnet in 

 Observations of Magnetic Declination. By William 

 Swan, Esq., . . . .318 



On the Accuracy attainable by means of Multiplied Obser- 

 vations. By Edward Sang, Esq,, . 319 



