604 JOHN WEINZIRL 



3. The source of the infection has been found in the egg 

 albumen used, and this is probably the most prevalent source, 

 but other materials used may ob\'iously carry the infection at 

 times.'' 



' The writer desires to acknowledge with gratitude the assistance of Miss Grace 

 A. Hill, whose help materially advanced the work; of Miss Edna Hamilton, who 

 assisted in part of the inoculation experiments;of Mr. Fred A. Anderson, scientific 

 expert for one of the local candy companies, for valuable information and advice; 

 and of all the local firms which cooperated in the work without whose aid it could 

 not have been completed. 



