Fungicides 



441 



mon use in this connection for a suspension of calcium hy- 

 droxid) a definite quantity of fresh stone-hme is placed in a 

 trough, slaked, and made up to a volume corresponding in 

 gallons to the weight of the lime in pounds. In slaking the 

 lime a small quantity of water is used to start the reaction, 

 and just enough water is added, as the lime slakes, to prevent 

 crumbling. The lime and water are stirred from the time the 

 hme starts to slake until the reaction appears to be complete. 



Fig. 222. — A convenient arrangement for mixiiif", Bordeaux 

 mixture. After Vermont Agr. Exp. Sta. 



Instead of diluting to the final volume at this point, it is 

 somewhat desirable to add just enough water to prevent 

 drying out and to allow the mixture to cool before the further 

 addition of water. This procedure permits further slaking, 

 which results in a noticeably creamier stock solution, with 

 fewer particles of unslaked lime to clog the nozzles. 



The common method in use in making Bordeaux mixture 

 in the field has been to dilute the required quantities of 

 copper sulfate and lime separately to half the final volume 



