RECENT WORK WITH HYDROCYANIC ACID GAS 2OQ 



and home consumption, and more healthy and vigor- 

 ous trees found in our fruit-growing districts. In 

 most cases the fumigation was successful wherever 

 experiments were conducted, and there can be no bet- 

 ter proof than that the growers are adopting this 

 method of destroying scales more and more as they 

 become acquainted with its advantages. ' ' 



Various materials have been used for making tents. 

 Mr. Allen thinks that tents made of sail-cloth will be 

 found durable and economical. We reproduce here- 

 with the table, compiled by Mr. Allen, for the various 

 amounts of chemicals to be used in orchards in New 

 South Wales. 



FUMIGATION TABLE FOR NEW SOUTH WAI.ES 

 ORCHARDS 



43 

 54 

 65 

 85 

 101 

 118 

 146 

 170 

 195 

 232 

 265 

 298 



432 

 437 

 492 

 547 

 601 

 540 

 608 

 675 

 743 

 810 



735 



817 



1,062 9 

 1,144 



778 



875 



972 



1,069 



1,168 



1,264 



1,361 



1,458 



947 



1,141 

 1,255 

 1,369 

 1,481 

 1,597 

 1,711 

 1,050 



15 



