e 
DISEASES OF HEART, BLOOD VESSELS, AND LYMPHATICS. 271 
chest or abdomen; occasionally the brain becomes affected. A few 
cases run a mild course and recovery may commence in three or 
four days; generally, however, the outlook is unfavorable. In severe 
cases septic poisoning is liable to occur, which soon brings the case 
to a fatal issue. 
Pathology.—On section we find the capillaries dilated, the connec- 
tive tissue filled with a coagulable or coagulated lymph, and fre- 
quently we may discover gangrenous spots beneath the skin or involv- 
ing the skin. The lymphatic glands are swollen and inflamed. Ex- 
tensive extravasations of blood may be found embedded between the 
coats of the intestines, or excessive effusion into the substance of 
the lungs. 
Treatment.—Diffusible stimulants and tonics should be given from 
the start. Carbonate of ammonia, 1 dram, fluid extract of red cin- 
chona bark, 2 drams, and tincture of ginger half an ounce, with half 
a pint of water; thin gruel or milk should be given every four or six 
hours. But especial care should be exercised to avoid’ injury by 
drenching. If the horse has difficulty in getting the head up and 
swallowing, smaller doses must be given with a small hard-rubber 
syringe. Sulphate of iron in 1-dram doses may be dissolved in water 
and given every six hours. Chlorate of potassium, in 2-ounce doses, 
may be given every eight or twelve hours. Colloidal silver may be 
administered intravenously in doses of from 5 to 12 grains. Wash- 
ings with lead and alum water are useful and may be repeated several 
times each day. If the swellings are very great, they may be incised 
freely and the resulting wounds should be washed at least twice daily 
with a warm 8 per cent solution of carbolic acid or other good anti- 
septic. Tracheotomy may be necessary. Complications, when they 
arise, must be treated with proper circumspection. 
DISEASES OF THE LYMPHATIC SYSTEM. 
The lymphatic, or absorbent, system is connected with the blood- 
vascular system, and consists-of a series of tubes which absorb and 
convey to the blood certain fluids. These tubes lead to lymphatic 
glands, through which the fluids pass.to reach the right lymphatic 
vein and thoracic duet, both of which enter the venous system near 
the heart. Through the excessively thin walls of the capillaries the 
fluid part of the blood transudes to nourish the tissues outside the 
capillaries; at the same time fluid passes from the tissues into the 
blood. The fluid, after it passes into the tissues, constitutes the 
lymph, and acts like a stream irrigating the tissue elements. Much of 
the surplus of this lymph passes into the lymph vessels, which in their 
commencement can hardly be treated as independent structures, sincé 
their walls are so closely joined with the tissues through which they 
