MIRACLES OF SCIENCE 



was to show the physician how to regulate the dos- 

 age of tuberculin and thus restore to use a discredited 

 remedy. A modified tuberculin, made from the bodies 

 of tubercle bacilli, is to-day in use as an effective 

 immunizing and curative agent against the "great 

 white plague." 



THE NEW METHOD EXTENDED TO A VARIETY OF DISEASES 



From the above explanation it would appear that 

 the vaccine treatment is chiefly a preventive measure. 

 But it soon occurred to Sir Almroth Wright that the 

 method has wider possibilities. After his signal suc- 

 cess with the anti-typhoid inoculation, he began de- 

 voting himself to generalizing the method and 

 applying it to the treatment of a great number of 

 bacterial diseases. 



Notwithstanding all that has been written on the 

 subject, few people perhaps are fully aware of the 

 extent to which bacteria are responsible for human 

 maladies. It is perhaps not going too far to affirm 

 that no disease to which flesh is heir is entirely free 

 from the possibility of complications arising from 

 the action of noxious germs. 



An inkling of the true state of affairs may be 

 gained from the observation that there are at present 

 known to the microscopist more than a score of dis- 

 tinct species of micro-organisms that produce human 

 maladies; while numerous others as yet not isolated 

 make their presence known through such infectious 

 diseases as measles, scarlet fever, and smallpox, the 

 germs of which have not as yet been discovered, 

 though their effects are so familiar. 



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