44 Professor Halford. 



Result. No bad effects. Half a fluid drachm was 

 thrown in directly into the right ventricle of the heart. 

 No injurious results. But when blood was taken from 

 an artery, it seemed of a brighter scarlet, and certainly 

 coagulated more firmly and rapidly than usual. 



EXPERIMENT II. 



One thousand grains of iodide of ammonium, dis- 

 solved in two ounces of distilled water, were gradually, 

 during twenty-five minutes, thrown into the external 

 jugular vein of another dog. 



Result. Dog perfectly unaffected. 



ANESTHETICS. 



Chloroform. 



Twenty-five minims were thrown into the external 

 jugular vein of a large dog. 



Result Almost immediate insensibility, with greatly 

 dilated pupils ; but in one minute, consciousness was 

 returning. Three minutes afterwards, I injected 

 another twenty-five minims. 



Result. Immediate insensibility, with dilated pupils. 

 I at once amputated a leg, but whilst I was sewing 

 together the flaps, consciousness was returning, as 

 evinced by expressions of pain. 



