Biting Insects 139 
which must throw a mist-like spray for a sufficient distance. 
Of the many nozzles in the market specially designed for 
the purpose, the Vermorel and the McGowen or Bordeaux 
nozzles seem to have found most favor; the latter is perhaps 
the best for general use in tree-spraying, because, although 
somewhat coarser, it throws the stream further. For satis- 
factory working it is 
necessary to keep the 
solution stirred and free 
from coarse particles 
which clog the nozzle. 
A common wooden STR 
pail with a 13-inch iron 
gas-pipe put through the 
bottom, which should be 
reénforced, and with 20- 
mesh iron wire cloth at- 
tached half way, makes 
an efficient strainer. { 
For use in public a 
panics 
parks and on street eater, 
trees, a steam-pump ap- TAR is 
iE 
A 
paratus, which can be 
had at from $400 un- 
wards, is perhaps pref- 
erable, although even 
here the hand-pump apparatus with a stronger pump, larger 
cask and more hose, keeping the cost within $60,! may be 
still sufficient in smaller communities, where not too many 
trees are to be treated. 
It would lead us too far to give a description of the vari- 
Fic 53 — Tank sprayer 
‘The very complete hand apparatus used in Worcester and Springfield, 
Mass., can be had for $125 
