192 MANUAL OF GARDENING 
have some kind of bucket pump like those shown in Figs. 221, 
222. Ona lawn or in a small garden a tank on wheels (Figs. 
223, 224, 225) is handy and efficient. In such cases, or even 
for larger areas, some of the knapsack pumps (Figs. 219, 220) 
are very desirable. These machines are always serviceable, 
because the operator stands so near to his work; but as they 
carry a comparatively small quantity of liquid and do not 
throw it rapidly, they are expensive 
when much work is to be done. 
Yet, in ordinary home grounds, the 
knapsack pump or compressed-air 
pump is one of the most efficient 
and practicable of all the spraying 
devices. 
For large areas, as for small or- 
chards and fields, a barrel pump 
mounted on a wagon is best. Com- 
mon typesof barrel pumps are shown 
in Figs. 226, 227, 228. Commercial 
plantations are now sprayed by 
power machines. There are many 
good patterns of spraying machines, 
and the intending purchaser should 
send for catalogues to the various 
manufacturers. The addresses may 
be found in the advertising pages 
of rural papers. 
233. Cyclone or vermorel type As to nozzles for spraying it may 
of nozzle, single and multiple... said that there is no one pattern 
that is best for all purposes. For most uses in home grounds 
the cyclone or vermorel type (Fig. 233) will give best satisfac- 
tion. The pump manufacturers supply special nozzles for 
their machines. 
