Physiology of the Brain. 3038 
wise destroy the opportunity sought. The water was now 
found at all depths to be 54°. A few weeks after this, the wa- 
‘ter was found to be sinking, when additional care was taken 
to prevent any water from falling into the winze; when it had 
sunk to within two feet of the bottom, the thermometer which 
was allowed to remain in the hole was suddenly withdrawn, 
when it was found to be at 54°. Two days after this period, 
this hole was dry, and showed the temperature of 70°. 
Not willing to rely too much on this single experiment, I 
sought another opportunity of repeating it in Huel Vor tin 
mine, situated in slate. Here a winze similarly circumstanced 
to the one just related occurred at the 124 fathom level. This 
winze was sunk just six fathoms before relinquished, at which 
time the temperature was 75°; but after being filled with wa- 
ter for about two months, the registering thermometer indi- 
cated only 56°; and this possibly might be influenced in some 
measure by its being found impossible wholly to exclude a fall 
of water running into it from above. 
I do flatter myself that these experiments tend much to 
strengthen my former assertions of the earth in general pos- 
sessing and preserving the mean annual temperature of the 
latitude; and although these experiments give a degree or 
two above this mark, we cannot but suppose the local causes 
of heat in a mine at full work must tend to influence the re- 
sults; but it should be observed that it falls far below what 
we are taught to expect at these depths, by those holding a 
different opinion from myself.—Ann. of Phil. 
PHYSIOLOGY OF THE BRAIN:—EXPERIMENTS OF MM. FLOU- 
RENS, MAJENDIE, ETC. 
Analysis of the Physiological labours of the Royal Academy 
of Sciences of Paris, for the year 1824, by M. Le Baron Cuvier. 
— We have reported in our analysis for 1822, with the interest 
which they deserve, the experiments of M. Flourens to deter- 
mine with more precision the functions proper to each parti- 
cular part of the brain; and we have seen that the result ap- 
pears to be, that the brain (cerebrum) properly speaking, is the 
receptacle for the impressions transmitted by the organs of 
sense; the cerebellum the regulator of locomotion; and the 
medulla oblongata the agent of muscular irritability; that the 
tubercula quadrigemina in particular participate in this irritant 
power of the medulla oblongata, and produce as it does, con- 
vulsions when stimulated. The author expected that these 
properties might contribute toward the solution of a problem 
in comparative anatomy which had for some time occupied the 
attention 
