XIX. THE EFFECT OF HEAT ON 

 ANIMALS 



THOUGH * iced beds ' cooled by a warming-pan filled 

 with ice are now recommended as a means to secure 

 sleep by night in hot weather, the effect of a rise in 

 temperature on the comfort of the animal world is 

 not yet discussed in the newspapers. Yet it is worthy 

 of remark that the conditions under which wild and 

 domesticated animals face sudden waves of heat are 

 very different. Most beasts of burden and draught 

 animals have to do as much work when the temperature 

 is above eighty degrees in the shade as in ordinary 

 weather, and in some cases even more, for heat makes 

 their masters less willing to walk themselves. In New 

 York sunstroke is very common among the omnibus 

 and tram horses. In Bombay an ingenious sun-helmet 

 has been invented to protect the back of the head and 

 first vertebra of the neck in horses compelled to work 

 when the sun is hot. The tram-horses, generally either 

 * Walers ' or from Central Asia, suffer both from head- 



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