194 BOARD OF AGRICULTURE. 



that water into vapor ; and that amount of heat carried off is of a 

 detinite (|uantity. Therefore, the amount of evai)oration that will 

 take phiee from a hot surface serves to reduce the temperature so 

 much. You can make water evaporate, but when you take a sub- 

 stance that will evaporate in air at an ordinary temperature, like 

 ether or camphor, and apply that to a hot surface it will cool the 

 surface with wonderful rapidit}'. The temperature may also be re- 

 duced by the application of cold. Accordingly, man}' ladies have 

 found that ice water, or water from the pump in winter, cools her 

 head better than alcohol or camphor, and to warm this water up to 

 that of an ordinar}' room requires heat. It therefore receives this 

 heat from the bodv. Now the cow with a hot head mav be treated 

 with bags of pounded ice placed between the horns, or the applica- 

 tion of cold water. 



Dr. Tucker, of Brattleboro, Vt., is about the only medical man 

 that I ever met who fully adopted this plan of treatment as applied 

 to domestic animals. Several 3'ears ago, in one of m\' lectures for 

 the University of Vermont, in that place, Dr. Tucker called the at- 

 tention of the audience to the successful application of this princi- 

 ple, in a well marked case of milk fever in his own cow, and stated 

 that he showered the cow's head, which was ver}' hot, with a stream 

 of cold spring water, for half an hour, and relieved the animal. 



Cold contracts and heat expands. Therefore treat .your cow with 

 either ice cold water or ice bags, for one thing. You have been 

 driving the blood awa\' from the head. Y^our next point is to coax 

 it away from the head. Set the boys at work with hot vinegar and 

 pepper rubbing the legs and bringing the blood down into those parts 

 which are cool, simply because the warm blood has gone to the head. 

 If a fire occurs in the centre of your village everybod}' rushes there 

 from the other parts, and the outskirts are therefore deprived of the 

 usual number of men, and so with the brain. The moment trouble 

 occurs there the blood abandons the extremities, and they become 

 cold. Rub the legs sharply with liniment, wrap them up in blankets 

 and keep them warm. What warms them up ? Not the mechanical 

 friction of your hands, but this process calls the blood back, and the 

 blood is warm. The hot air that warms the car does it precisely as 

 the blood warms the legs. The friction simpl}- coaxes the blood 

 there again. Throw a blanket over the body of the cow to prevent 

 evaporation ; keep the circulation active ; leave the head exposed to 

 the cold air. Another way to coax the blood away from the head is 



