£22 Prof. Gmelin on the Analysis of a 



men's- I forget what in Scotland. At the end there was a 

 -sort of tag, as if the egg had been attached to something. 



The young snakes hatched from the eggs are still doing 

 well, (July 18, 1825,) only one of them having died out of 

 twenty-eight. On the fourteenth day after birth, they cast 

 their first skins. They increase considerably in size, but the 

 snake-catchers are of opinion, that they will take many years 

 to acquire their full growth. 



Art. VII. — Analysis qf a Lithion-Mica from Zinnwald in 

 Bohemia. By C. G. Gmelin, Professor of Chemistry in 

 the University of Tubingen. In a Letter to Dr Bhewster. 



Dear Sir, 



I have the honour to send you the result of the analysis of a 

 Lithion-Mica, along with a few laminae, with the request 

 that you may examine their optical structure. When I had 

 found that the micafrom Chursdorf wasa lithion-mica, I search- 

 ed in vain for others of the same nature in my small collection 

 of minerals. Soon after I met with a beautifully crystallized 

 mica from Zinnwald in Bohemia, which I immediately reckon- 

 ed to be lithion-mica. While I was engaged with its analysis, 

 I received the 5th number of your Journal, where I found 

 that several species of lithion-micas had been already discover- 

 ed by Messrs Turner and Haidinger. The lithion-mica from 

 Zinnwald, which I have analysed, is accompanied by tungstate 

 of lead. I have obtained the following result : 



100.000 



This mica loses by ignition not more than 0.83 per cent., and 



