SCIENTIFIC PROGRESS 11 



It is inconceivable that any anti-vivisectionist, if bitten by a 

 rabid dog, would not hasten to be given a Pasteur treatment to 

 prevent the horrible death from hydrophobia which would 

 otherwise almost inevitably result, or if stricken with syphilis 

 would not submit to treatment with salvarsan in order to pre- 

 vent the prol)able ruin not only of his own life, but also of the 

 lives of his life-mate and of his unborn children. There is little 

 thought then of the blood of the monkeys, guinea-pigs, or other 

 animals with which the God of Knowledge was paid to make 

 such treatments possible! 



The discoveries mentioned in this brief resum^ of the history 

 of parasitic diseases are but a few of the more conspicuous mile- 

 stones on the path of progress of modern medicine as related to 

 animal parasites. They may be likened to the posts of a fence, 

 while the hundreds of other discoveries, less striking in them- 

 selves, perhaps, but nevertheless necessary, correspond to the 

 pickets. The posts are useless without the pickets as are the 

 pickets without the posts. There is not one of the great out- 

 standing discoveries in the field of parasitology and preventive 

 medicine which could have been made without the aid of the 

 less illustrious accomplishments of many other scientists. Our 

 present ability to cope with and control disease is due not alone 

 to the great work of such men as Manson, Laveran, Ross, Pasteur, 

 Koch, Reed, Schaudinn and Ricketts, but also to the careful, 

 pains-taking work of thousands of other investigators, who, often 

 without any semblance of the honor and recognition which they 

 deserve, and perhaps even under the stigma of public denuncia- 

 tion, work for the joy of the working and feel amply repaid if they 

 add a few pickets to the fence of scientific progress. 



