382 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



carry less than a pound to the gallon and the last more. In 

 another 50-gallon barrel suspend 50 gallons of copper sulphate 

 crystals in a sack close to the top, and then fill the barrel with 

 water. The copper sulphate suspended in this way will dis- 

 solve in a few hours, or over night, while if it is placed in the 

 bottom of the barrel it will dissolve with difficulty unless the 

 solution is constantly stirred. Some prefer to make stock solu- 

 tions carrying 2 pounds of lime or copper sulphate to the gallon. 

 In that case use 100 pounds of material instead of 50 in each 

 50-gallon barrel. 



To prepare the mixture from the stock solutions, assuming 

 that they carry a pound to the gallon and a 3-3-50 bordeaux is 

 to be made, stir thoroughly and for each 50 gallons of spray 

 dip out 3 gallons of the lime stock into one dilution barrel and 

 3 gallons of the copper sulphate stock into another, add water 

 to make up to 25 gallons each, then quickly and thoroughly 

 mix. If the stock solutions carry 2 pounds of material to the 

 gallon use i^ gallons of each to 50 gallons of mixture. 



Elevated mixing platform. Much of the labor of making 

 bordeaux may be avoided, and better facilities furnished for 

 securing a perfect mixture by the use of the elevated mixing 

 platform. This requires four solid posts resting on flat stones 

 or set in the ground and extending above the surface somewhat 

 above the top of the spray tank, to form the supports of the four 

 corners of the platform. These posts should be solidly braced 

 by means of crossed boards nailed from one to the other. To 

 the tops of the posts on the outside around the four sides, pieces 

 of 2x6 or equally strong material are spiked with the edges up — 

 these to serve as sills. Other cross sills may be necessary for 

 added strength, varying with the size of the platform. Lastly 

 a floor of good sound plank is laid over the sills. The size of 

 the platform varies somewhat with the location and needs of the 

 user, but it should be large enough to accommodate the barrels 

 for the stock solutions and dilution barrels, and leave sufficient 

 room to move about, 10x12 feet is large enough for most places. 

 Fig. 266 shows the platform in use at Highmoor Farm. The 

 higher platform with the large tank is for water storage. 



The dilution vessels should be large enough so that both to- 

 gether will contain enough liquid to fill the spray tank. That 

 is, for a lOO-gallon tank 2 50-gallon casks will be required for 



