12 Jones, Action of Alkalies on Glass and on Paraffin. 



fusible in the Bunsen flame, whicli was tinged bright yellow. 

 On analysis it was found to contain silica 6574, alumina 

 and iron 326, and lime 141 1 percent. There was also 

 combined water. On reviewing these results it appears 

 clear that none of the three alkaline solutions experi- 

 mented on exerts any appreciable action on glass bottles 

 in the first few hours, and it seems therefore difficult to 



Fig. 2. 

 believe that the accuracy of the I'cltenkofer test for 

 carbon dioxide can be appreciabU- affected by the use of 

 any one of them. 



On prolonged contact in a glass bottle there is a 

 marked, [action in the case of lime water, but not in the 

 ca.se of the two other alkaline solutions, which lose ver)- 

 little oftheir alkalinity even when in contact with powdered 



