FUMIGATIOir 



289 



an easy matter to determine the distance over the tent and the cir- 

 cumference at the ground. When these figures are known, the 



Dosage chart for fumigating citrus trees (Bureau of Entomology, U. S. Dept. Agric.) 



proper dosage may be obtained from the above chart, which 

 has been prepared for a strength of one ounce of cyanide for 

 each 100 cubic feet of space. 



