Miscellaneous Intelligence. 477 
Til. Astronomy. 
1. On the apparent Connection between Sun-spot and Atmos- 
: pheric Ozone ; by T. Morrat.—aAt the last meeting of the British 
| Association, Mr. Smith, of Cirming, gave me a record of new 
4 groups of sun-spots which appeared in each year for a number of 
years, an me to compare the mean daily quantity of 
TV. MISCELLANEOUS SCIENTIFIC INTELLIGENCE. 
1. Permanent Ice in a Mine in the Rocky Mountains; by 
R. Wetser of Georgetown, Colorado. (Communicated.)—Geolo- 
gists have been not a little perplexed with the frozen rocks found 
in some of our silver mines in Clear Creek Co., Colorado. I will 
first give a statement of the facts in the case, and then a theory 
for their explanation. 
‘ There is a silver mine high up on McClellan Mountain, called 
the “Stevens Mine.” The altitude of this mine is 12,500 feet. 
rocks, is found to be in a soli frozen mass. McClellan Moun- 
tain is one of the highest eastern spurs 0 owy Range; it 
has the form of a horse-shoe, with a bold escarpment of feldspathic 
the frozen material, and in the morning take out the disintegrated 
ore. This has been the mode of mining for more than two years. 
