274 
EXTRACTS FROM FOREIGN JOURNALS. 
show Dr. Gadsden and his student the head of the horse and his 
decayed teeth , if they will do us the honor to call at the American 
Veterinary College, where all can be seen by any one interested. 
EXTRACTS FROM FOREIGN JOURNALS. 
MICROSCOPIC AND COMPARATIVE CHARACTER OF THE SOURCES 
OF HORSE-POX, COW-POX AND HUMAN VACCINE. 
By C. Megnin. 
The author has examined the four following samples of vaccine: 
1st.—That collected from the pustule of a heifer, obtained 
from a second culture of horse-pox. 
2d.—Fresh vaccine from a heifer, resulting from the culture 
of the JBeaugency cow-pox. 
3d.— Human vaccine, of the Academy of Medicine, preserved 
on shides and dissolved in a drop of water. 
4th.—Human vaccine recently obtained from the arm. 
The fonr liquids examined by M. Megnin with a magnifying 
power of diameter, show a great' number of punctiform cor¬ 
puscles, which he considers spornliform microbes. In the first 
two specimens (horse-pox and cow-pox), they have a uniform size 
of one thousandth of a millimeter; in the two others (human 
vaccine), the diameter is one fifth smaller. M. Megnin asks if 
the passage of horse-pox through human organism, as it diminishes 
the size of the microbe, does not also alter its activity. He has 
also remarked that the microscopic preparations were the next 
day loaded with such quantities of these microbes that it had 
become milky in aspect —(Academic of Medicine ). 
RUPTURE OF THE UTERUS, AND OF THE RIGHT UTERINE 
HORN DURING GESTATION, IN A COW. 
By M. Lad ague. 
On the 22d of June, at 10 p.m., I was called to attend a cow, 
which, since 3 o’clock, seemed dull and tympanitic. 
History .—The cow was seven months pregnant, was kept in 
