EPITHELIAL TUMOBS. 



347 



thetic (except in slight operations of the eye, in which ••' local" 

 anaesthesia with cocaine is sufficient). We generally use chloral, 

 ether, chloroform, or bromo-ether. It is advisable to give chloral 



Fig. 76. 



Manner of tying the mouth. 



in the form of a clyster. We inject the following solution in the 

 rectum of a medium-sized dog, fifteen minutes before the operation: 



Chloral hydrate 



Aqua 



Mucilage 



.8.0 



100.0 



25.0 



FlQ. 77. 



The other agents are inhaled by means of an anaesthetic cover- 

 ing — a flannel mask. The mask is made of wire netting shaped 

 like a muzzle, covered with flannel, and held under the ani- 

 mal's nose (Fig. 77, a). We must 

 take care that a certain amount of 

 air is inhaled with the vapor of 

 the anaesthetic. The pulse, respi- 

 ration, and reaction of the eyelids 

 must be watched at the same time. 

 After a few inhalations we notice 

 a period of excitement which is 

 marked by great restlessness, howl- 

 ing, groaning, and, in rare cases, 

 delirium. This is followed in a 

 short time by a period of depress- 

 ion, and after that the narcotic con- 

 dition is completely established. 

 The cornea has now become insen- 

 sible — that is to say, there is no reflex action or closing of the eye- 

 lid when touched. The muscles are now entirely relaxed, feces and 



a, inhalation mask; b, inhalation hottle. 



