1 Apnin, 1899.] QUEENSLAND AGRICULTURAL JOURNAL, 269 
Prepare as follows (for the 40 gallons solution, the 22 gallons solution in 
proportion) :— ; 
(1) Dissolve 6 Ib. of bluestone in 20 gallons of cold water in one cask, by 
placing it in a bag and suspending it in the water. 
(2) Slack 4.1b. of unslacked lime in another cask slowly by first pouring 
about 8 pints of water over it. This will reduce the lime to a thick 
cream free from lumps. Water should now be added, stirring well 
till there is 20 gallons of milk of lime in the cask. 
(3) Stir the milk of lime up well, strain it and pour the whole of the 20 
gallons of milk of lime and the 20 gallons of bluestone water 
together slowly into a third cask ; stir well for 8 minutes, and if 
properly made the mixture is fit for use. 
The mixture is much better if made in this manner than when a strong 
solution of bluestone and lime are first mixed together, and water to make up 
the required quantity is afterwards added. 
In order to see if the mixture is properly made, plunge the blade of a knife 
into it for a minute. If the knife is untarnished the mixture is all right; but if 
the knife is stained a coppery colour, then more milk of lime must be added. 
The mixture should always be neutral, as if there is an excess of blues! one 
it is apt to injure the foliage. Use water that is free from iron, and do not 
make the mixture in iron, zine, or tin vessels of any kind—wood is the best. 
If desirable, a stock solution of bluestone may be kept on hand for 
use as required. Such a solution may be made by dissolving 100 Ib. of 
bluestone in 50 gallons of water. Place the 100 Ib. of bluestone in a bag and 
suspend it in the cask of water, and in the course of a couple of days the whole 
of the bluestone will be dissolved, and each gallon of the solution will contain 
2 Ib. of bluestone. 
To make the 40-gallon solution you therefore take 3 gallons of the stock 
solution of bluestone and add 17 gallons of water to it, to make up the 20 gallons 
of bluestone solution for mixing with the 20 gallons of milk of lime as pre- 
viously described. A stock solution of milk of lime can also be made, but it 
is better to make it as required. ; 
Bordeaux mixture is a fungicide, and it is of little value as an insecticide. 
1t, however, combines well with arsenical poisons, in which’state it is a very good 
combined spray. 
; B. 
Paris GREEN. 
This is the best remedy for all insects that actually devour their food. It 
is a powerful arsenical poison, and a good sample should contain at least 50 
per cent. of arsenious acid. It is generally used by itself, but if desired it can 
be used with lime, in the proportion of 1 1b. of Paris green to 4 lb. or more 
of lime. Mixing it with lime tends to make it less dangerous to handle, and 
will not interfere in any way with its action. It canalso be used iu conjunction 
with Bordeaux mixture. The best way to mix Paris green with water is to 
place it in a cup or billy with a little cold water and thoroughly moisten every 
particle, the same way as mustard is mixed up for table use; then add more 
water gradually, stirring well whilst doing so, till it is thoroughly mixed ; then 
add the requisite quantity of water. Paris green is used at a strength not 
execeding 1 lb. to 160 gallons of water. It must always be kept well stirred whilst 
inuse. It must not be sprayed on during rain, sunshine, or heavy drying winds. 
It should not be. applied to either fruit or vegetables within a month of the 
time of gathering. It should be handled with care, and kept out of the way 
of children. It should always be applied as a very fine spray, and’ persons 
spraying should take care not to inhale too much of the spray. 5 
When used on eabbages, it is a good plan to add a little treacle to the 
water in which the Paris green is suspended, as this will make the mixture’ 
adhere better. 
