402 
COM PTE RENDU OF THE 
when he soon exhibited so much weakness in the hind quarters 
that it seemed as if palsy was commencing its attack. 
The horse died, and we found, on opening him, that the mid- 
dle and internal face of the right lung had been the seat of a 
very acute' inflammation, already becoming gangrenous. In 
every other part the substance of both lungs was perfectly sound. 
The third was a draught horse, very old, which was brought 
to the school eight days before, and then abandoned for his little 
worth. He presented every exterior appearance that would be- 
token acute pneumonia. In this case the auscultation was ex- 
ceedingly obscure, and we hesitated considerably with regard to 
the diagnosis. 
The pulmonary sound was strongly heard through the whole 
extent of the left lung, but in the right lung every thing appeared 
to be right. 
On examining him after death, we found the left lung per- 
fectly sound, and the right lung completely and perfectly hepatized. 
From its dorsal to its inferior border, and from the anterior lobe 
to the surface of the diaphragm there was one permeable vesicle. 
This result, so little expected, would have made us doubt the 
exactness of our observation, if, on the morning of the death of 
the horse, struck by the discordance that existed between the 
indications that were furnished by the general state of the ani- 
mal and the apparent soundness of the thoracic organs, we had 
not requested one of the students to assure himself, by an atten- 
tive auscultation, that there was no error on our part. 
This singular fact, of the perception of the normal respiratory 
sound on one side of the chest, while the lung on that side was 
completely impermeable, explains itself, as it would seem, by its 
very impermeability. On the left, the sound lung, and through 
which alone the act of breathing took place, caused a supple- 
mental sound to be heard, that terminated on the right side, 
across the lung become already a solid body, and rendered by 
that transformation a better conductor of sound. 
Catarrhal Affections of the Respiratory Passages. 
(Emetie.) 
In our account of the scholatic year 1839-40, we announced 
the happy results we had obtained in the treatment of old ca- 
tarrhal affections of the chest by the administration of emetic 
tartar, in variable doses, from four to sixteen grains or more. 
We have continued from that time, and especially during the 
current year, to make many clinical experiments on the effects 
of this medicine, and, three years having passed, and almost 
every experiment being fortunate, we think we may affirm that 
