December, 1909. J 



THE CODLlMi .MOTH. 



85 



with a ]00 or 150 gallon tank, will give better pressure and will 

 make the work more rapid. Such a pump is shown in Figure 14 

 and costs from $30 to $50. 



For orchards of over 500 trees a power outfit will be found 

 more economical. Gasoline engines are now most generally used 

 for power, and are desirable in that many types may be detached 

 from the pump and used for other purposes during the winter. 

 Such outfits with engine, pump, tank, and tower, all mounted 

 on a suitable truck, are 

 sold by all the loading 

 pump makers at from 

 $250 to $350. Several are 

 now in use in New Hamp- 

 shire and giving excellent 

 satisfaction. Frequently 

 one can be used by several 

 parties or for a whole 

 neighborhood. One vounu' 

 man purchased one this 

 year, and in a com- 

 munity where practienlly 

 no spraying had been 

 done before, secured 

 enough work to pay for 

 the outfit. 



In our own work we 

 have used a carbonic-acid 

 gas spra^-er very satis- 

 factorily. The outfit is 

 shown in Figure 16. The li<inid carhonie-aeid gas is allowed to 

 pass into the steel tank containing the liquid and forces it out, 

 without the use of a pump. The operation of the outfit is simple. 

 The expense of operation is somewhat greater than for gasoline 

 power, but the investment is not as large and tlie weight on the 

 truck is much reduced, so that a heavy hor.sc will |)iill a 100 gal- 

 lon tank on level ground. The gas sprayer cannot, however, be 

 used satisfactorily with lime-sulfur mixture. 



^lost New Hampshire fruit growers will find the barrel pump 

 best adapted to their needs, for by the use of a row attachment it 



Fig. 14.— a double-acting levpr pump, for use with, 

 a large tank, for large orchards. 



