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Nature- Study Agriculture 



. T. Shilling 



FlG. 197. Preparing Bordeaux mixture. This method of mixing the chemicals 

 causes them to unite properly. 



grapes with a mixture of bluestone and lime to discourage 

 passers-by from stealing them. It was noticed that the 

 grapes so sprayed yielded much better than those not 

 sprayed. Bordeaux mixture is usually made with a 

 strength of " five-five-fifty " ; that is, five pounds of 

 bluestone, five pounds of lime, and fifty gallons of water. 

 To make one tenth this amount, dissolve half a pound 

 of bluestone and half a pound of quicklime separately 



