Spraying Apple Okchards in a Wet Season. 393 



15. In the preparatioD. of the Bordeaux mixture 13.21 parts of 

 slaked lime of the composition given on page 292 are equivalent to 

 ten pajpbs of quick lime. (Page 386.) 



IG. More copper appears to remain in solution when slaked lime 

 is used tlian when the lime is fresh. (Page 387.) 



17. The quantity of copper remaining in solution diminishes 

 rapidly as the liquid is allowed to stand. (Page 388.) 



18. The action of heat is favorable to the decompoisition of cop- 

 per compounds remaining in solution in the Bordeaux mixture. 

 (Page 388.) 



19. The copper is precipitated in the, Bordeaux mixture in the 

 form of hydrate, basic sulphate and the double basic sulphate of 

 copper and calcium. (Page 390.) 



20. It is probable that the precipitated copper compounds are 

 affected by the carbonic acid gas of the atmosphere. The solvent 

 action is particularly strong when the copper is in the form of the 

 basic sulphate. (Page 391.) 



E. G. LODEMAN, 



Assistant in Horticulture, 



50 



