T. S. Hunt on the Chemistry of Natural Waters. 199 
sen to 1°04 parts of bromid of magnesium. The waters of 
hitby and Hallowell, on the contrary, which are the richest 
in bromids of those described in this paper, contain only 0°54 
and 0°69 parts of bromid of sodium in 100 parts of solid mat- 
ters; while few of the saline springs of the second class contain 
more than one-half of this proportion, and some of them very 
much less. 
Vieve, of the second class also give a strong reaction for iodine ; 
and when acidulated with hydrochloric acid, without »previous 
€vaporation, yield with a salt of palladium an insoluble precipi- 
tate of iodid of palladium after a few hours. The salts from 
two springs of Ste. Genevieve, though poorer in bromids, 
- are much richer in’ iodids than the waters of Hallowell; the 
spring No. 8, containing in 100 parts of salt no less than 0-1 
of Si so that there appears to be no constant proportion 
between the chlorids, bromids, and iodids of these saline waters. 
