20 



with water, stirring all the wliile, aud tlae spray is ready to use. Kercr 

 liowr tlie undiluted bluestone water into tlie undiluted milk of lime, or a poor 

 chemical union will result. Such a mixture has poor fungicidal value, settles 

 rapidly and clogs the nozzles. 



Stock Solutions. 



Where more than a barrel or two of Bordeaux is to be made, it saves time 

 to make what are called stock solutions : — 



Weigh out and put into a long, deep trough like a "feed trough"' enough 

 lime to make a definite number of barrels or tanks of spray. If the barrel 

 holds ."0 gallons, or the tank 100 or 150 gallons, use some multiple of four 

 pounds of lime, say 40 jiounds. Bring to milk of lime by adding just the 

 numlier of gallons of water that you use pounds of lime, here 40 gallons. The 

 lime slacks best if warm or hot wat<'r lie used as a starter. Dissolve in a very 

 large tub or wooden tank 40 pounds of bluestone in 20 or 40 gallons of water. 

 Never use less water than 1 gallon to each 2 jiounds of bluestone, or the 

 material will recrystallise in the bottom and on the sides of tlie container. 



Then all you have to do is to measure out 4 gallons of the milk of lime. 2 

 or 4 gallons of the bluestone water, dilute to about 15 gallons each and pour 

 together into the barrel. If the spray-tank holds 2 or .3 barrels, you have to 

 measure out two or three times as much aud <lilute two or three times as much 

 as for the b.-irrel. 



Testing Spk.\y. 



If the lime ii.sed is a fine lime, neither air-.slaked, imiiropcrly burned, nor 

 having nuich " rock " in it, I have found 4 pounds suflicient to each 4 pounds 

 of bluestone. However, many stations now recommend using G jiounds of lime 

 to 4 poiHids of bluestone. aud this should certainly be done if the lime is not 

 firist-class. The best way to assure oneself that be has lime enough is to test 

 the mixture. There are three ways of testing : — 



1st. Dip a perfectly clean, bright blade of a pocket-knife into the Bordeaux 

 and leave it in it for about one minute. If there is not lime enough, a thin, 

 reddish stain of copper will be left uiion the blade. 



2ud. Fill a small bowl with the Bordeaux, and, holding it level with the 

 eye, breathe gently upon and across the liiiui<l. If it is jiroperly made, and 

 there is an.v excess of lime, the carbonic acid of the breath will cause a thin 

 liellirli' to form on to]i. 



."rd. Dissolve in six ounces of water one ouuce of ferro-cyanide of potas- 

 sium. Pour some of the Bordeaux into a bowl aud add a little of the 

 solution to it, drop by drop. If a brownish di.scolouratiou takes iilace, you must 

 add more lime to the stock solution and tank. 



Uses of This Spray. 



A/iplc Seal). — T'se once before flowers open, best just as buds are bursting, 

 and two or three times after fruit has set, according to the prevalence of rain 

 and cloudy weather. In ordinarily pleasant seasons three sprayings are 

 enough. When aplying the last two sprayings the insecticide can be added 

 to the sjiray. thus scab and insects being combated at the same time. 



