Pomona College Journal of Entomology 



Volume 11 



SEPTEMBER 1910 



Number 3 



FUMIGATION STUDIES III 



ESTIMATING THE CUBIC CONTENTS OF FUMIGATION TENTS 



BY WRIGHT M. PIERCfi 



Perhaps no other single feature of ordinary contract fumigation has 

 contributed more to the utter uncertainty of results, than the common practice 

 of assigning dosages by guess-work. Woglum has shown that this method 

 gives results varying 50 per cent even in cases of men who are confident 

 of their ability to guess right every time. Our own observations in this 

 vicinity show that the guess-work method may readily furnish variations 

 of hundreds of cubic feet. Combine this practice with that of working as 

 near ns possible to the minimum flosage for a given scale and it will be 



Figure lOO. The use of the marKed tent under favorable circumstances 



