iv Preface to the Eighth Edition. 



the education of the agricnltural community in the need of 

 effective methods for stamping out animal plagues, a subject 

 which has been so ignorantly and ineffectively dealt with in 

 our legislative halls. 



The author feels warranted in bespeaking for the revised 

 edition a continuance of those favors that have been so 

 freely accorded to its predecessors. 



JAMES LAW, 



Cornell University, 



Ithaca, March, 1887. 



