60 Agricultural Journal of Victoria. 



A good sample of Paris Green should contain : — 



Copper Oxide .. , .. .. .. .. 31-29 



Arsenious Acid . . . . . . . . . . 58.65 



Acetic Acid .. .. .. .. .. 10 06 



Arsenate of Soda is made according to the formula of Professor Kedzie, 

 of America. Place 1 lb. of White Arsenic and 2 lbs. of Washing Soda 

 in a gallon of water, and boil until the contents go into solution, which 

 is almost colourless. This is used at the rate of 2 pints to 80 gallons 

 of water and lime water added in the same way as for Paris Green, 

 and makes up to 80 gallons. These two mixtures are about the same 

 strength. 



The Arsenate of Soda spray gives rather better results than the 

 Paris Green ; this was brought out very clearly in a series of spraying 

 experiments by Mr. G. Quinn, Fruit Inspector, South Australia. In 

 spraying with Paris Green it is necessary that the mixture should be 

 constantly agitated to prevent settling, growers should therefore see 

 that their pump is fitted with an efficient agitator. 



In applying the spray do not drench your 'trees until the liquid 

 drops fi'om the leaves, as little good is done in that way, rather just 

 spray sufiicient to damp the trees all over with a fine mist, and leave 

 off before the leaves begin to drip. The lime used should be perfectly 

 fresh, otherwise it is of no use. 



