232 
SOLLY ON THE BRAIN. 
“On the base or under surface of the brain we observe that the olfactory 
ganglia or tubercles are very highly devoloped ; they are, in fact, nearly three 
times as large as those of the human subject, a size which appears to corres- 
pond with the complicated structure of the nose of this animal, and to be in 
proportion to their sense of smell. The olfactory commissures are short 
and thick, scarcely a line’s breadth being left between the tubercle and the 
point where they are united to the under surface of the hemispheres. These 
commissures appear to extend backward some way further than the point 
where they are first attached to the surface of the cerebrum. The olfactory 
tubercles themselves are composed of medullary and cineritious neurine. 
“The pons varolii, or tuber annulare of Willis, is small in the sheep compar- 
ed with the same part in man : here it is not more than three lines in breadth. 
The corpora mamillaria are united so as to appear like a single body. The 
tuber cinereum is not particularly distinct. Through its centre we find a 
sort of funnel-shaped tube passing, called the infundibulum , which joins a 
rounded structure situate on the sphenoid bone, called the pituitary gland. 
The character or analogy of the last-mentioned parts is extremely obscure, 
and there is a mystery here which has not yet been unravelled. The medulla 
oblongata, like that of the rabbit, is very thick in comparison with the spinal 
cord. 
“The origins of the nerves occur in the sheep precisely as in the human 
being, and need not, therefore, be dwelt upon in this place; although, in 
dissecting the brain of the sheep, reference may be very advantageously 
made to the base of the human brain for assistance in discriminating several 
of the particular pairs of nerves. In Plate V, a sketch of the under part of 
the brain of the horse has been introduced, merely for the purpose of shew- 
ing the amazing development of the olfactory ganglia in one of those ani- 
mals in which the sense of smell attains a high degree of perfection ; and 
also for the sake of demonstrating the impropriety of classifying analogous 
parts in the human being, under the head of nerves with bulbous extre- 
mities. A section of the olfactory ganglia in the sheep further illustrates 
the same anatomical truth, by exhibiting the arrangement of the pulpy and 
medullary neurine, fig. 2, same plate.” 
We are quite assured that our readers will not be satisfied 
with this imperfect account of Mr. Solly’s excellent work, but 
will give the volume a place next to that of Dr. Quain, as em- 
bodying the greater part of what it is necessary for them to 
know of the anatomy of the human being. 
CORRESPONDENTS. 
Our legal friend is liolyday-keeping. Ere the next number is published 
we will obtain the requisite information. We much regret the delay. 
We must positively refuse to become a party in the disputes between stu- 
dents of other schools, or to presume to interfere when there are differences 
of opinion on theoretical or even practical points between the principal 
and a few of his class. The gentleman who has urged this upon us must 
be fully aware of the impropriety and discourtesy of such a proceeding. 
Thus far, however, we have no objection to state, that, in our firm belief, 
wood-evil and red- water are both diseases of the digestive system. 
Will our Correspondents kindly favour us with their communications on 
or before the 15th day of the month ? 
