82 



FUMIGATION METHODS 



estimated. By taking half the difference and adding 

 it to the contents of the cylinder the estimation was 

 found approximately correct. 



CHEMICALS ESTIMATED FOR EASTERN ORCHARDS 



A careful study of the tables made by various indi- 

 viduals for orchard work is interesting. The present 

 practice in California does not vary much in amount 

 of cyanide used per cubic foot from that originally 

 estimated by Coquillett and Morse. The results as 

 summed up by Woodworth are given in the following 

 table. 



