338 tHE SECRET OF A TERRIBLE DISEASE 



recognised the terrible infective particle itself. There is a 

 very high probability that in these cases, and also in cancer 

 (where as yet no specific infective germ or parasitic 

 microbe has been detected), such an infective microbe is 

 nevertheless present, and has hitherto escaped observation 

 with the microscope on account of its excessive minute- 

 ness and transparency. 



