213 



izing process which can take phice in ocean water by infiltration, 

 volcanic ashes, or divided materials of plastic rocks being present, 

 as analysis shows them to be. The rock is hydrous, losing nearly 

 ten per cent, of its weight by ignition, or 



Water with a little organic matter - - - - 10.00 



Bone Phosphate of Lime, - 85.20 



Carbonate of Lime, 3.00 



Oxides L'on, Manganese and Alumina, - - - 5.22 



Silicic Acid and Sand, 1.78 



105.20 



The excess of weight being due to the estimation of the phos- 

 phoric acid united to lime as bone phosphate of lime, while truly 

 part of it, with a portion of silica, is united to the oxides present. 



Dr. John Bacon exhibited some Calculi, six or seven 

 hundred in number, taken from the bladder of an ox. 

 They were amorphous, presenting no crystalline forma- 

 tion, and containing only a small quantity of organic 

 matter. This is one of the rarest forms of urinary 

 stones. 



On motion of Mr. Charles Stodder, it was voted to 

 appoint a Committee to take into consideration and 

 report upon the subject of establishing a Microscopic 

 Department of the Society. 



Messrs. Durkee, Jackson, Bacon, Shaw, Sprague, An- 

 drews, and Barnard, were appointed this Committee. 



George Duncan Gibb, M. D., of London, was elected 

 a Corresponding Member. 



