22 



of the Geological Society. The abstract read by His Grace 

 on this occasion was illustrated by a number of drawings and 

 specimens. 



The order of beds shewn in the drawings, from above downwards, 

 was as follows : — 



1. A bed of basalt, rudely columnar. 



2. A bed containing impressions of leaves of dicotyledonous trees. 



3. A bed of tuff, or trap conglomerate, having the aspect of vol- 

 canic ashes. 



4. A bed of leaves similar to No. 2. 



5. A bed of tuff similar to No. 3. 



6. A third bed of leaves similar to the two former. 



7. A bed of amorphous basalt ending in basalt highly columnar. 



2. Analysis of the Mineral "Waters of Baden Baden. By 

 Dr Sheridan Muspratt. 



The author, after mentioning that no analysis of this water is to 

 be found in any English work, and the great multitudes who resort 

 to it, described briefly the situation of the Ursprung or original 

 spring, the chief one at Baden, which was known to, and esteemed 

 by, the Romans. 



It has a temperature of 153 5" F., and contains, in the imperial 

 gallon, 18ri20 grains of .solid matter. The predominating ingre- 

 dient is chloride of sodium or common salt, which amounts to 132'6 

 grains in the gallon. Next to this comes carbonate of lime, dissolved 

 no doubt as bicarbonate, which is deposited as carbonate on boiling. 

 The other ingredients, which are in trifling quantity, are detailed in 

 the first table given below as obtained in the analysis. In the se- 

 cond, they are arranged in the order of their probable occurrence in 

 the water. 



