Insolation. Sun-stroke. Thermic Fever. 45. 



struggling ineffectually to rise, or having periods of comparative 

 quiet. The rectal temperature is very high, 107" to 114° F. If 

 able to stand, there is usually blindness and heedlessness of sur- 

 rounding objects. 



Symptoms. Sheep. The open mouth, protruding tongue, 

 frothy saliva, reddened fixed eyes, rapid breathing, beating 

 flanks, stertor, and unsteady gait are characteristic when taken 

 along with the manifest causes. Swaying movements followed 

 by a sudden fall and death in convulsions form the usual termina- 

 tion of the disease. 



Symptoms. Dog. These have been mainly produced experi- 

 mentally and consisted in hyperthermia, dullness, prostration, 

 accelerated breathing and heart action, congested veins, and 

 mucosae, muscular weakness, convulsions, and syncope or as- 

 phyxia. After death the muscles became speedily rigid, and 

 the blood accumulated in the venous system, was fluid or only 

 loosely coagulated. In these animals, if the experiment were 

 stopped in time the animal could be restored to health. 



Slighter cases may occur in the different animals, more partic- 

 ularly from overdriving in hot weather, and in such cases the 

 overheated animal recovers, but there is liable to remain a special 

 sensitiveness to excessive heat and a tendency to be dull, sluggish 

 and short winded, to hang the head in hot weather, and to seek 

 shelter from the direct rays of the sun. 



Diagnosis is largely based on the suddeness of the attack, on 

 the occurrence of high temperature before the seizure, not after as 

 it is liable to be, if at all, in apoplexy, on the dark congestion of 

 the mucosae, and of the venous system, on the rapidity and shal- 

 lowness of the respirations, on the tumultous actionof the heart, 

 and on the general loss of sensory and especially of motor func- 

 tion, in circumstances calculated to induce sunstroke. Localized 

 paralysis or spasm would suggest the formation of a cerebral ef- 

 fusion or clot. 



Prevention. This will depend on the class of animal and its 

 conditions of life and work. In horses care should be taken 

 to regulate the work by the heat of the season and condition of 

 the animal. When the temperature ranges from 80° to 100° F. 

 the work should be lessened and every attention should be given 

 to maintain the healthy functions (bowels, kidneys, skin) in good 



