Potato Growing in Colorado 
29 
nate is placed in a shallow dish or earthen vessel and the formalde¬ 
hyde solution is poured over it. The operator m!ust leave the cellar 
immediately and close it up tightly to escape the fumes. If the cellar 
is large and requires large quantities of chemicals, several vessels or 
dishes should be used, placing them in different portions of the 
cellar so that the fumigation may be more uniform. The cellar 
should be left closed for 48 hours, or longer. 
acknowledgment 
The writer wishes to thank Mr. Lou D. Sweet, of Denver, for 
the loan of several of the illustrations in this bulletin. 
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