532 
Since then, however, the necessity of dressing vines with mixtures 
containing copper salts, and other insecticides, has led to the more 
general use of specially designed pumps that distribute the liquid 
with greater rapidity and under the form of minute globules in a 
fine spray. 
oSaSm: 
(EE. 
Barrow Spray Pump. 
Pumps should be chosen with reference to the amount of work 
to be done. Syringes are hardly suited for extensive out-of-door 
spraying. Bucket Pumps are very serviceable in small gardens. 
Knapsack Pumps are suitable for orchards of young trees, and for 
vineyards set too close to admit of the use of wheeled machines. 
Barrel Pumps on a sledge or a cart in large gardens and com- 
mercial orchards and vineyards. Power Pumps worked by petrol 
engines and carried on wheels offer the advantage of rapidity of 
work, higher pressure and more thorough spraying with multiple 
delivery hose and nozzles. Price and weight must be considered. 
Garden Syringe—the simplest Spray Pump. 
A cheap pump, that will distribute clogging and _ corrosive 
mixtures all tie time, and be simple enough to stand the rough 
using of farm and orchard hands, who know little more about 
spraying than to work the pump handle, is not very easy to get. 
All parts of component spray pumps must be of the very best and 
suitable description—hose, nozzle, means of controlling the liquid 
supply from pumps, elevating the nozzle, ete. 
