The Canadian Horticulturist. 155 



2. Ammoniacal Copper Carbonate was prepared according to the following 

 formula : 



Copper Carbonate 5 oz. 



Ammonia , 2 qts. 



Paris Green 4 oz. 



Water 50 gallons. 



The Paris Green was stirred in after the dilution to the full amount, viz., 50 

 gallons. This precaution was taken, as strong ammonia dissolves Paris Green 

 readily. It was noticed that the Paris Green very quickly subsided in fluid, 

 when the latter was allowed to remain at rest. 



{a) The fluid with the suspended Paris Green was thoroughly shaken for 

 two days and a portion withdrawn and filtered. On analysis it was shown to 

 contam traces of arsenic. 



{b) For seven days more the mixture was continually agitated. A portion 

 was then filtered and analysed, the result showing that heavy traces of arsenic 

 were in solution. It was clearly proved, however, that no appreciable quantity 

 of the Paris Green had been dissolved. 



Consequently, as in the case of the Bordeaux mixture, Paris Green may be 

 added to the Ammoniacal Copper Carbonate without its insecticide qualities 

 being injured or materially lessened. 



It may be pointed out that successful spraying depends upon many factors, 

 only one of which is the quality or composition of the fluid. Carefulness, 

 thoroughness, the time and frequency of application, and the character of the 

 season, have all a marked effect upon the result. 



Frank T. Shutt, M. A. 

 Chief Chemist Dominion Exp. Farm. 



Exposure for a Rose Bed. — A friend inquires what is the best exposure 

 for a rose bed. We would say that any exposure is good enough, the main point 

 being to have the soil in proper condition, which is that it shall have drainage 

 and be well enriched. On a level surface especially must the drainage be well 

 attended to, but this is scarcely less necessary on hillsides even of considerable 

 declivity, if the soil is heavy. A slope to the east or to the north, we think, most 

 desirable for roses, for the reason that the blooms will last longer and there is 

 less danger from severe freezing in winter. A southern exposure might give a 

 litde earlier bloom, but it would be of shorter duration, and the danger of injury 

 in winter is greater, and the same is true of a western exposure. But if the 

 circumstances should decide any one of these exposures it should not exclude the 

 pleasure of a rose bed. Ejl^erience might vary with the different exposures, and 

 varieties which might succeed with one might not be so well adapted to another; 

 but this is true in regard to all locations. The rose is so beautiful and desirable, 

 and with moderate attention will bloom so generally that it should be universally 

 planted, and that not sparingly. — Vick's Magazine. 



