Insects and Insecticides. 
39 
leum, in a mechanical mixture along with water, so as to do away 
with the need of making an emulsion. 
For the treatment of small orchards a barrel pump is gener¬ 
ally used. One of the best of these is Gould’s “ Pomona ” spray 
pump shown in Fig. 22. The pump carries two leads of hose and 
has a patent agitating arrangement within the barrel. It is sold 
by The Gould Manufacturing Co., Seneca Falls, N. Y. 
Where a large amount 
of orchard spraying is to 
be done larger pumps and 
tanks should be used. 
Fig. 23 shows a gasoline 
power sprayer attached to 
a large wagon tank. Such 
sprayers will easily run 
four leads of hose and 
keep up a high pressure. 
Without a good pressure 
it is impossible to throw 
a fine and forcible spray. 
Fig. 23.— Power Pump. Run by Gasoline Engine. The power Sprayer here 
shown is also manufactured by The Gould Manufacturing Co. 
There are many other companies manufacturing spraying appar¬ 
atus. Their advertisements will be found in agricultural papers. 
If anyone is thinking of purchasing an expensive spraying outfit he 
should obtain catalogues and prices from several manufacturers or 
dealers and then purchase where he thinks he can do best. 
HOW TO SPRAY. 
The first requisite for a good job of spraying is a pump that 
will give plenty of pressure in the hose. Then, if one has a good 
spraying nozzle and a liquid that is free from solid particles of a 
size to clog the sprayer, there will be no difficulty in getting a good 
spray. A very fine spray is most economical of material and, for 
an even and thorough distribution, is best. Care should be taken, 
also, not to continue the spraying until the little drops that collect 
on the foliage unite and run off, carrying the poison with them. In 
some cases, however, as when spraying the first and second times 
for the codling moth, the writer prefers a rather coarse spray and 
to continue until the calyces of the forming fruits have all been 
thoroughly drenched without regard as to how much the liquid is 
dripping from the foliage. The medium coarse spray is preferred 
for this work, because the larger drops carry better into the 
blossoms, or calyces, of the apples. 
The “ Seneca ” nozzle sold by the Gould Manufacturing Co. 
and shown at Fig. 24 throws a good coarse spray. The “Bordeaux ” 
