274 Scientific Intelligence. _ 
statements of Prof. Rogers that the brine of these salt wells is stronger 
and purer than any other brine known in the United States.. The usual 
proportion of salt in it is about 23 per cent.; eighteen gallons yielding 
one bushel of salt. It is entirely free from the chlorids of calcium 
and magnesium, and as a consequence of this, and of the absence of 
iron, the salt is dry and colorless—no appreciable quantity of bitlern 
being produced in the evaporation. Gypsum is the only foreign ingre- 
dient present in any notable quantity, and this is easily and completely 
separated in the process of evaporation. 
cent rocks beds of anhydrite have b loped on the 
Preston estate, confirming the view thal volcanic steam and thermal 
waters ha concerned in the production of the sum beds 
A report on the Geology and mining resources of that part of the 
Lackawanna Coal Basin which includes the lands of the Delaware, 
ackawanna and Western Railroad Company, and those of the Lacka- 
magnitude unexampled hitherto in the United St 
5. The Metallic Wealth of the United States described and compared 
with that of other Countries ; by J. D. Wuirney. 8vo, pp. 510. Lip- 
Pincott, Grambo & Co. 1854,—We have read this volume with pleas- 
ure and no small share of instruction. While, as its title implies, the 
main object of the author is to unfold the metallic resources of the 
United States, he has given us by way of comparison a con 
