624 SCIENCE PROGRESS 



misfortune of an unreasoning dread of anaesthetics is to be 

 avoided, the danger of anaesthesia must be reduced to whatever 

 may be its unavoidable minimum, by applying in the hospital 

 the clear teaching of the laboratory. 



A direct indicator of the percentage of chloroform in the 

 air delivered to the inspiration of a patient is, in my opinion, a 

 valuable safeguard. It is not difficult to secure ; it is legible at 

 a glance, I do not say that its use v^ould abolish all danger, 

 but I do assert that the common knowledge of the physiological 

 arithmetic of chloroform would go far to diminish the excessive 

 price of anaesthesia. 



