SOCIETY MEETINGS. 
301 
importance to us as American veterinarians, that cannot be done by 
local or other associations. ^ 
4th The mercenary view-take it in a business light; will it pav ? 
Yes, it will pay even if you never attend any meetings. You will re¬ 
ceive the printed proceedings of the association, and in numerous other 
ways receive more than your money’s worth. 
MISSOURI VALLEY VETERINARY MEDICAL ASSO¬ 
CIATION. 
( Co?itinued from page 2jo.') 
Dr. B. F. Kaupp, being called upon, presented the followino- 
paper on 
LEUCAEMIA. 
i .^ucocythaemia, or sometimes called leucaemia, is a disease 
which affects horses, cattle, hogs, and other animals, including 
ma rei j. 1 SayS 11 has ne X er been reported in a sheep or o- 0a t! 
lie disease is characterized by a great and permanent in¬ 
crease m the number of white blood corpuscles, by a diminution 
m the number of red blood corpuscles and by an enlargement 
o the lymphatic glands. The spleen is one of the organs most 
frequently affected. In the normal state there is found one 
w ite blood corpuscle to 350 red in nearly all warm-blooded 
animals. According to Zuill, in the horse and dog there is one 
white blood corpuscle to about 800 red. In leucocythsemia 
there may be one white corpuscle to 50, 25 or even 2 red. 
Leucaemia appears. to be more common in cattle than in other 
animals 111 this section of the country. 
. ^ le direct cause of this disease seems to be unknown. The 
primary lesions involves one of the blood-making organs, the 
spleen, lymphatic ganglions or red marrow of the bones The 
lymphatic glands most often affected are the ganglions of the 
head, neck, and. shoulders, of the extremities, and of the ab¬ 
dominal and pectoral cavities. These glands become tumefied ' 
and hypertrophied. The disease may also involve the spleen 
liver, kidneys, uterus, bladder, lungs, subcutaneous connective 
tissue, the serous membranes, mucous membranes, etc. Leu¬ 
caemia infarcts consist of a diffused infiltration of the tissue by 
white corpuscles, an infiltration which surrounds the blood ves¬ 
sels with a kind of whitish gray membrane. The new lvmpli- 
like tissues are circumscribed tumors, the histological structure 
somewhat resembling that of lymphatic ganglion. The spleen 
becomes enlarged, sometimes to enormous dimensions. The 
enlargement is uniform, so that the organ has practically the 
