394 Miscellanies. 
eralogists to be one of the most select and beautiful collections ever formed 
in this country. 
Edenville, April 12th, 1839. 
5. Correction.—In Vol. xxxv, No. 2, p. 375, we mentioned the suppo- 
sed spontaneous crystalization of liquid carbonic acid in one of Dr. Tor- 
rey’s tubes. Ina letter from him dated New York, March 1, it is re- 
marked that the crystals which we had observed were 
sulphate of ammonia, which was formed by the combina- 
tion of sulphuric acid with ammonia during the decom- 
position of the carbonate to obtain the carbonic acid 
gas for condensation. He adds, “a very good method 
of showing the rapid condensation of the carbonic acid, 
and its ebullition at the same time, is to surround the 
upper part of the tube with a freezing mixture. Place 
the mixture (ice and salt) in a bottle, the bottom of which 
is cut off. The mouth is furnished with a perforated 
cork, through which the upper part of the tube is thrust. 
“IT have been shooting with a kind of air gun, using 
my liquified carbonic acid for throwing the balls, and [ 
hope soon to emulate Perkins’ steam gun.” 
carbonic 
acid. 
sulph. 
ammo- 
nia. 
6. Footsteps and Impressions of the Chirotherium, and of vart- 
ous Animals, in sandstone.—The readers of this Journal are familiar 
with the reports made by Professor Hitchcock, on the foot marks of 
birds and perhaps quadrupeds upon the sand stone rocks of the val- 
ley of the Connecticut River. See vol. xxix, p. 307, and vol. xxxil, 
p- 174. We have cited also those observed ten years ago at Corn- 
cockle Muir in Scotland, vol. xv, p. 84; and more recently near Hild- ~ 
burghausen, in Germany, vol. xxx, p. 191. 
We shall now, from the reports of the doings of the Geological So- 
ciety of London, cite some other facts of this class, We allude to 
the now famous quarries of Storeton Hill, near Liverpool, England. 
We have recently received from Prof. Buckland fine copies of these 
impressions, and it is no more possible to doubt the genuineness of 
their originals, than those of the must recent impression of a foot made 
in any yielding surface of the present hour. The same is true of the 
impressions of Prof. Hitchcock, whatever doubt may have been felt 
by some persons who have never examined them. : 
The communication which we now cite was made to the Geological 
Society by the Natural History Society of Liverpool, with drawings 
by John Cunningham, Esq. 
