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If it be desired to economise space the “ stock solution ” of 
copper sulphate may be kept at the strength of 2 lb. of copper 
sulphate to each gallon of water, that is to say, ioo lb. of copper 
sulphate may be dissolved in 50 gallons of water. It is not well, 
however, to increase the strength of the “ stock solution ” of lime, 
since the slaked lime in “ milk-of-lime ” made at the rate of 2 lb. of 
quicklime to one gallon of water settles so quickly that it cannot be 
measured out accurately. 
The barrels containing the “stock solutions” must be kept 
under cover, i.e„ protected from sun and rain. If stood in a shed, 
and covered with fairly close-fitting lids made by nailing sacking 
round the edges of a wooden lid— such “ stock solutions ” keep per- 
fectly satisfactorily throughout the spraying season. Two 50-gallon 
barrels hold sufficient for the making of 625 gallons of Bordeaux 
mixture ; while if the “ stock solution ” of copper sulphate be 
increased in strength to 100 lb. in 50 gallons of water, and another 
50-gallons barrel of “ stock solution ” of “ milk-of-lime ” is added, 
these three barrels will supply enough to make 1,250 gallons of 
Bordeaux mixture. By storing such “ stock solutions,” made just 
before the summer spraying season commences, the grower has the 
means, of obtaining in a few minutes at any time a large supply of 
Bordeaux mixture of the best quality. 
The making of Bordeaux mixture on a large scale from “ stock 
solutions ” is greatly facilitated if some simple ‘ plant be erected. 
The erection consists of two elevated platforms. The higher plat- 
form is carried on four 9 ft. 6 in. posts, 5 in. by 4 in., sunk 2 ft. 6 in. 
in fhe ground and well rammed. Joists, 5 in. by 4 in., connect the 
heads of the posts, into which they are halved. Am intermediate 
ioist is halved into the middle of two opposite joists. The upper 
platform is 5 ft. square, and consists of 6 in. by I in. boarding in the 
rough, laid to the edges. The lower platform, which is 6 ft. 6 in. 
square, is similarly constructed, and is carried on sleepers, 6 ft. long 
and 10 in. by 5 in., set vertically and sunk 2 ft. 6 in. in the ground 
and well rammed. The two structures are bolted together at the two 
back posts and where the front post of the higher platform touches 
the joist of the lower platform. 
On the higher platform are two 50-gallon “dilution barrels, 
marked inside at the 50-gallon level, and fitted with taps. If possi- 
ble, water should be laid on to this higher platform. On the lower 
platform stands a vat (fitted with a tap) capable of. containing 100 
gallons. A short length of hose (“ canvas hose ” is convenient o 
use) is fitted to the taps of the “ dilution barrels and of the 
ioo-gallon vat. The process of making 1 00 gallons of Bordeaux 
mixture is as follows :--Eight gallons of the “ stock solution. o 
“ milk-of-lime,” and the same amount of copper sulphate stoex 
solution ” (or four gallons only if this has been made of the streng 
of 2 lb. of copper sulphate to the gallon of water) are carried up to 
