REPORT ON THE DISEASES OF SILKWORMS IN INDIA 91 



•diseased (pebrinised) parents for several generations no real de- 

 generation is got, and my result's have confirmed this. Eemove 

 the causes of disease and the inferior cocoons will disappear. Of 

 course, it must not be forgotten that, under given climatic condi- 

 tions, a certain quality of cocoon will be. produced for any parti- 

 cular race of worm — that, of course, has nothing to do with disease 

 but is a purely physiological matter. 



