46 Professor Halford. 



COMMENTS. 



This obeyed the same physical law as the chloroform, 

 becoming almost as rapidly exhaled from the lungs as 

 it was thrown in. 



Ozonic jEther. 

 EXPERIMENT I. 



Two fluid drachms were injected into the femoral 

 vein of a dog. 



Result No insensibility ; rather seemed happier. 



About this time (1874), I had begun using the 

 micro-spectroscope, and the year before Dr. John Day, 

 of Geelong, had contributed several valuable papers to 

 the Medical Society of Victoria, on the Oxidising 

 Properties of Ozonic ^Ether, or Peroxide of Hydrogen. 



EXPERIMENT II. 



I placed some diluted venous blood in the little 

 tube supplied with the micro-spectroscope, and at once 

 obtained the spectrum of reduced haemoglobin. I 

 then removed the little cork, and added a drop or two 

 of the ozonic aether. I then inverted the tube, so as 

 to allow of the fluids to mix ivithout shaking. 



Result The broad dark venous band gradually dis- 

 appeared, its place being taken by the two characteristic 

 bands of the oxyhaemoglobin spectrum. 



I have for the last twenty years yearly repeated the 

 experiment for the benefit of my students. I com- 



