88 
CONTRACTED CARD!A 
These two experiments appear to me to corroborate what Ma- 
gendie, Bouillaiid, and Legallois have advanced concerning 
the opposite functions of the cerebrum and cerebellum. They 
afford good reason for believing that the anterior lobes of the 
cerebrum preside over motion backward, since during compres¬ 
sion of , the cerebellum, and consequent suspension or destruc¬ 
tion of motive influence, retrogression is all that can be per¬ 
formed, as has been illustrated in the case of the lamb ; on the 
other hand, when the anterior lobes of the cerebrum are the 
parts affected, the animal is only capable of moving forward : 
in which case the cerebellum' preserves its integrity. 
The first of these experiments, and likewise those cases of 
staggers in which cysts are discovered in the cerebrum, corro¬ 
borate, nay, confirm this theory. Now, therefore, that it ap¬ 
pears ascertained that in genuine staggers the cerebrum is af¬ 
fected, I shall prosecute my researches with a view of coming at 
a more scientific treatment of this malady* 
In conclusion, we may observe, that the effects of opium are 
not correctly indicated by the words sedative, irritant, narcotic, 
debilitant, employed at the present day. . Its characteristic vir¬ 
tue, one with which we have no parallel, is to act directly on 
the anterior lobes of the cerebrum; in large, doses paralysing 
their functions altogether. Under its influence the will has no 
longer controul over the movements of the animal: he is preci¬ 
pitated forward in spite of every obstacle. 
Communications antt C-aseSt 
CONTRACTED CARDIA. 
A Mecklenberg horse, eight years old, apparently perfectly 
sound, was purchased last August at one of the many sales by 
auction of continental horses which took place in the course of 
the summer: from which period until November, with the ex- 
