* 
Sir C. Lyell on the Mineral Waters of Bath. 17 
German chemist of the exact amount of distention which the 
origin of new mineral products may cause, by adding to the 
volume of the rocks, deserve the attention of geologists, as af- 
fording them aid in explaining those reiterated oscillations of 
level—those risings and sinkings of land—which have occurred 
on so grand a scale at successive periods of the past. There are 
movements. meee 
The temperature of the Bath waters varies in the different 
springs from 117° to 120° F. is, as before stated, is excep- 
as 200 feet. Mr. Charles Moore pointed out to me last spring, 
4 which must be inferred from the different levels at which the 
Same formations crop out on the flanks of the hils to the north 
and south of the city. I have therefore little doubt that the 
Bath springs, like most other thermal waters, mark the site of 
‘Some great convulsion and fracture which took place in the crust 
Am. Jour. Sct, 
—Ssconp Srrres, Vou. XXXIX, No. 115.—Jan., 1865, 
3 
