198 Scientific Intelligence—Geology. 
In a postscript, the author adds, that blood found in the heart im- 
mediately after death by bleeding, presents incessant alterations in 
the position of its corpuscles. Among these, when asingle corpuscle 
is examined very attentively, it is seen to change its form; and the 
author is disposed to think it is this change of form that produces 
the alterations in position. The changes in form are slight, compared 
with those previously described by him as observed in blood else- 
where, and are not seen without close attention. The motions re- 
semble those called molecular ; and in the minutest corpuscles, which 
are mere points, nothing besides molecular motion can be discerned. 
It may be a question, the author thinks, whether molecular motion 
differs in its nature from the motion of the larger corpuscles just 
referred to. The division of the blood-corpuscles into corpuscles of 
minuter size, though apparent in blood from either side of the heart, 
has seemed more general in that from the left side ; which, it is sug- 
gested, is perhaps deserving of notice in connection with the subject 
of respiration. 
GEOLOGY. 
Remarks on the Freezing of Water—By Professor Krizs of 
Gotha.*—On a previous occasion I had an opportunity of repeating 
Professor August’s observation on the freezing and non-freezing of 
water in vacuo,t by means of a beautiful double water hammer which 
our cabinet received from the collection of Duke Ernest II. This 
instrument had remained many winters quietly hanging in a shut-up 
cabinet, but, in the severe winter of 1629-30, it was unfortunately 
frozen in two, and the ice and water fell out; so that I had no op- 
portunity of remarking the nature of the former. I cannot say what 
temperature caused this to take place; for, as my house is not in 
communication with the collection of instruments, several days often 
elapse without my visiting it. 
I had at another time an opportunity of making an interesting ob- 
servation on the freezing of water in the case of an electric light 
apparatus, which, during a very cold night, had stood not far from 
the window of a cold room which was never heated. The fine glass 
ball, about eight inches in diameter, was entirely filled with water, 
and I imagined that by the morning it would certainly be broken in 
two. But, on the contrary, it was entire, and the water perfectly 
pure and liquid. I opened carefully the cock, and allowed some 
water to escape, so as to provide space for expansion when the re- 
* From Poggendorf’s Annalen. 1841. No. 4. t Ib. vol. lii. p. 184. 
