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orchard moth caterpillars. 
For work on a still larger scale, there appears every reason to hope 
that the distributor popularly known as the Strawsonizer, would be 
excellently serviceable. The successive trials of this “air drill” for 
distribution of dry dressings in the finest powder, or fluid dressings in 
misty spray, have been so fully placed before the agricultural public 
that there can be no reason to describe the general method of this 
distributor over again. But looking at the adaptibility for orchard 
spraying, it is satisfactory to know that both the horse power and 
hand power machines have, or can have, vertical delivery, both with 
spray and dust. With ordinary delivery pipes, 25 feet may be taken 
as the height dressed, but as the delivery pipes can be made any length, 
a much greater height can be reached if desired. 
The great recommendation of this machine, for the present purpose, 
is the minute quantity of fluid which can be distributed in a fine dew¬ 
like spray; this, so far as experiment shows at present, doing the work 
we need very thoroughly, and at a low cost, excepting original outlay for 
the “ Strawsonizer” itself. 
So far as we see, the hand machine would be the most useful, and 
it will be very desirable to have reports given, as soon as tried, of its 
practical workings in spraying infested orchards.* 
As the use of Paris-green has only been really taken up on a working 
scale amongst us during the past season, and the want of proper 
apparatus has been one great difficulty in our way, I am only 
able to give observations regarding appliances which have been brought 
uuder my notice. The spray can be distributed from a common 
garden engine, but this method involves great loss of material from 
quite unnecessary quantity of fluid spread abroad, and also great risk 
of over-application to the leafage. 
Whatever kind of sprayer is used, it must always be borne in mind that 
the mixture must be kept an even strength throughout, and no sediment to 
form at the bottom, or damage to leafage is sure to happen. 
In mixing the Paris-green in the form of dry powder with the 
water, the method recommended in Prof. Riley’s ‘ Seventh Missouri 
Report, 1875,’ p. 15, is a very simple one, and makes it quite unneces¬ 
sary to handle the powder. The recipe is given here merely with regard 
to method of mixing, not with reference to any special proportions:— 
“ Two bucketsful of water are first poured into the can, then three 
tablespoonsful of good green, well mixed with another half-bucketful 
of water and strained through a funnel-shaped strainer .... the use 
of which prevents the larger particles of the green from getting into 
the can and clogging up the sprinkler.” 
The exact method of mixing, however, is quite immaterial—only 
* The address of the manufacturers is Messrs. R. Hornsby & Sons, Spittlegate 
Iron Works, Grantham, who will give particulars on application. 
