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JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



fumigated one hour. No injury was noticed to stock of this kind until 

 the amount of cyanide was raised to 0*45 gr., and in this instance the 

 terminals were only slightly injured. Apple was not affected, even when 

 six times the normal strength was used, while Plum stood nearly three 

 times the usual amount, and Pear from three to four times the normal dose. 



Points to Remember. 



In handling the cyanide, and in generating the gas, it must be borne 

 in mind at all times that this chemical, which is white as snow and looks 

 very much like lump sugar, is very destructive to animal life, and the gas 

 generated from it, if inhaled, fatal in most instances. 



Cyanide should be carefully labelled " Poison," and kept out of the 

 reach of children and other persons. It should not be exposed to air, as 

 it will absorb moisture rapidly and be ruined. 



Never fumigate a tree on which you know there are San Jose Scale. 

 The furnace, and not the fumigating house, is the place for such trees. 

 A dead Scale on a tree is just as demoralising to the nursery business as a 

 live one, if the fruit grower sees it. Never fumigate peach a second time. 

 It is not desirable to fumigate trees in a box car, after it is packed, as it is 

 practically impossible to thoroughly ventilate such an inclosure afterward. 



Trees should not be fumigated when they are drenching wet. They 

 may be moist, even quite damp. The roots should not be puddled before 

 the trees are fumigated. It should be borne in mind also that the nursery 

 stock should be thoroughly dormant, otherwise unfolding buds will be 

 injured. Fumigation, therefore, should be done late in the autumn and in 

 the early spring as much as possible. 



Never lose an opportunity to caution persons in your employ or on 

 your place about the terrible danger of breathing this gas. 



If all these precautions are regarded, there is not the least danger in 

 handling this material, and nurserymen can rest assured that they have 

 done all in their power, if the work has been properly conducted, to give 

 th fruit grower all the protection possible. 



