48 



GARDEN FOES. 



CHAPTEE X. 



CYANIDING. 



A NEW PROCESS FOR DESTROYING INSECTS. 



A NEW method of dealiDg with insect and fungoid destruc- 

 tion on a large scale has been undergoing a practical test 

 for some time, and the results obtained have been fairly 

 satisfactory. The process, however, is one which requires 

 to be carried out with considerable skill, since the chemi- 



[Photo: J. G. Blakey. 

 A SIMPLE CYANIDING APPARATUS. 



A shows the apparatus ready for use, and B the bottle tilted by pulling 

 a string: so that the acid can. fall on the cyanide in the ves<;el. 



cals used are of a deadly poisonous nature. As this 

 Handbook would not be complete without some reference 

 to the subject, we reproduce the subjoined ably-written 

 article contributed by Mr. W. M. Bear to the pages of 

 "Farm and Garden." 



" No reference to insecticides would be complete at the 

 present time without mention of the process of cyaniding, 



