262 Practical Orcharding On Rough Lands. 



sure stored up in the air chamber. So we 

 should choose a pump with a large air cham- 

 ber. Then if it should be necessary for the 

 man at the handle to stop a minute to loosen a 

 hose that has caught, perchance on a stub or 

 rock, the power would not be noticeably weak- 

 ened, but the operator with the spray rod would 

 be able to do effective work for a short time at 

 least even after the pump had stopped. 



The pump should be supplied with a pres- 

 sure gauge in order that we may be sure that 

 we are getting a given amount of power. It is 

 hard for the tired man to realize that the pres- 

 sure is not as heavy in the evening, although 

 he seems to be working just as hard as he was 

 in the morning when he was fresh from a good 

 night's rest. The gauge will tell the tale, and 

 be of great value in aiding us in making the 

 application uniform and thorough. 



A pump should have sufficient capacity to 

 admit of the use of two leads of hose, as it will 

 economize time to spray two rows at once. We 

 should see that the pump we choose is simple 

 and easily taken apart, so that if anything 

 should get out of fix it would not take too much 

 time ,„' elieve .he .rouble. All worUa, pans 

 should be brass so as not to be affected or in- 



