CHAPTER XXXV 



A Tabulation of Diseases and Insect Transmission 

 W, Dwight Pierce 



In view of the fact that a very large number of diseases have been 

 mentioned in these lectures, and that the sa,me disease has often been 

 mentioned in several lectures, it was thought desirable to prepare a 

 tabulation of the information presented in this volume in the most con- 

 crete form possible. In the fourth column under method of insect trans- 

 mission, I have drawn frequent conclusions as to the probable mode of 

 transmission, based on analogy. In each such case a modifying word 

 makes it clear that the statement is not proven. Unquestionably we must 

 draw such conclusions and test them out, for by such methods we can 

 greatly facilitate progress in investigation. Unquestionably in many of 

 the diseases cited below, insect transmission is not the most important 

 mode, but on the other hand, I am just as confident that insect trans- 

 mission will prove to be the most important mode in other diseases now 

 considered to be carried otherwise. In no wise in this entire course do I 

 claim responsibility for proving insect transmission, nor am I able to 

 justly repudiate the claims made by others. The evidence is presented 

 for what it is worth and occasionally with theoretical suggestions by 

 myself, but each reader must seek the original evidence and weigh it him- 

 self. Undoubtedly there are many inaccuracies of fact in this tabulation 

 and in the chapters on disease transmission. Some of them may have been 

 corrected but overlooked in compiling the present work. 



There is always a danger that people will accept a tabulation as 

 authoritative. It is not, in this case at least, a critical compilation. 



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