I05 



or other receptacle in which it is contained. So frequent 

 stirring of the liquid is demanded to retain the Paris Green 

 in suspension. Much stronger applications of Paris Green 

 were formerly made than were necessary. One pound of 

 the green to one hundred gallons of water is sufficient for 

 the potato. One pound to one hundred and fifty gallons 

 enough for apple, and one pound to two hundred (or even 

 more) gallons ample for plum or peach. 



LONDON PURPLE. 



London purple is another arsenical poison. It varies 

 in comjjosition but contains something near the same 

 amount of arsenic as Paris Green. It is a by product from 

 the manufacture of aniline dyes. It is cheaper in cost than 

 the green, and its particles are finer, so it remains in a 

 water mixture much longer. These are advantages. The 

 trouble is however, London purple contains considerable 

 soluble arsenic, and therefore it is much more liable to in- 

 jure the foliage of trees and plants than is Paris Green. 



BORDEAUX MIXTURE. 



The Bordeaux mixture is the most successful applica- 

 cation for fungous growths known to science. The formu- 

 la for preparing it is as follows: 'Copper sulphate six 

 pounds, quicklime four pounds, and water, 50 gallons. 

 Dissolve the copper sulphate in hot water and dilute it in 

 twenty-five gallons of water. Slake the fresh lime and 

 dilute in twenty-five gallons of water. Then finally strain 

 lime solution into the copper solution and thoroughly mix. 

 The Bordeaux mixture needs t'o be used promptly after 

 being prepared, as it deteriorates rapidly when kept. 



Four or five ounces of Paris Green may be added to the 

 fifty gallons of the Bordeaux mixture, and then the best 

 known combination of insecticide and fungicide will be ob- 

 tained. As a general spraying mixture this must receive 

 the highest endorsement. 



