62 PLANT DISEASE 



be, but be they in the form of bacteria or in 

 any other form, ozone is potent for their de- 

 struction." 



T. Lauder Brunton, in Materia Medica, 

 says " Ozone, it is thought, would be useful 

 in destroying organisms which produce dis- 

 ease." 



Professor Tyndall has also proved the value 

 of ozone in destroying germ life. 



If a deficiency of ozone in the air be associated 

 with the occurrence of epidemic cholera, etc., 

 it requires no argument to support the view 

 that a deficiency of ozone in the animal econ- 

 omy will render it more or less susceptible to 

 cholera bacillus. 



R. A. Proctor, writing on ozone, mentions 

 an experiment carried out by Dr. Richardson, 

 who placed a pint of blood taken from an ox 

 in a large wide-mouthed bottle. The blood 

 had then coagulated, and it was left exposed 

 to the air until it had become entirely re- 

 dissolved by the effects of decomposition. At 

 the end of a year the blood was put into a 

 stoppered bottle and set aside for seven years. 

 " The bottle was then taken from its hiding 

 place," says Dr. Richardson, " and an ounce 



