42 CANINE AND FKLINE SURGERY. 



for a large dog need not in the majority of cases be more 

 than I in looo, and for very young animals and those of the 

 smaller and more delicate breeds i in 3000 or i in 4000 

 parts of air is not too small a percentage, especially at the 

 commencement. 



If using a wire muzzle and towel the latter should be folded 

 two or three times after the anaesthetic has been put on it and 

 the ether allowed to flow much more rapidly from the drop 

 bottle or measure ; with an inhaler air must be excluded at 

 the end of the mask as much as possible, always of course at 

 the discretion of the anaesthetist. With this drug the stage of 

 excitement is longer, and that of anaesthesia shorter, than where 

 chloroform is used. 



The A.C.E. mixture is particularly useful for small, delicate 

 dogs and cats. With it there is not so much risk of producing 

 dangerous symptoms as when chloroform alone is used bj^ an 

 inexperienced anaesthetist, and the mixture does not produce 

 so much salivation as when ether alone is used ; besides which, 

 the stage of anaesthesia lasts longer, and that of excitement is 

 shorter, than when ether is used. It thus occupies a middle 

 place between chloroform and ether. 



