RECKNT WORK WITH HYDROCYANIC ACID GAS 213 



ogist. Through the courtesy of Director W. H. Jor- 

 dan, the writer secured the following summary of the 

 experiments. 



In regard to these tests, Professor Lowe says : 

 ' ' Our work consisted principally of experiments in the 

 orchard and with bud-sticks. The former were mainly 

 for the purpose of determining the strength of gas re- 

 quired to kill the scale during the winter and spring, 

 and incidentally the effect of the gas upon the trees, 

 and the latter to determine the effect of the gas at dif- 

 ferent strengths upon fruit buds. The experiments 

 in the orchard were divided into two series, as shown 

 by the following summaries : 



WINTER TREATMENT 



Trees fumigated December 13-24; weather cloudy 



Trees f-u 



SPRING EXPERIMENT 



igatedjune 6-8 and June 16-24; weather cloudy 



