. Department bulletin. S1»HAY PUMPS. 171 ol)t;iiiUHl iVoin oloyivs whicli nvv hir^c I'oi' llic Imnds, imd in .such (lu» hands arc not as apt to jHM'spirc. A\'h(M(' ru])h('r «ilov(*sai'(' not <)))tain- a))U^ the hands may l)o privatly protoctcd and kept soft hy rul)l)inj^ tlicni th()roii<]chly, as often as iHH'OSsary, with a piece of beef suet. If corrosive sprays are to be applied, such iis thc^ sinii)h' solution of coppiM* sulphat(\ eau celeste, etc., it may be found necessary to pi'otect the eyes. For this purpose ordinary clear <^'lass <»()^<i*l(\s may be used, or the sprayer
. Department bulletin. S1»HAY PUMPS. 171 ol)t;iiiUHl iVoin oloyivs whicli nvv hir^c I'oi' llic Imnds, imd in .such (lu» hands arc not as apt to jHM'spirc. A\'h(M(' ru])h('r «ilov(*sai'(' not <)))tain- a))U^ the hands may l)o privatly protoctcd and kept soft hy rul)l)inj^ tlicni th()roii<]chly, as often as iHH'OSsary, with a piece of beef suet. If corrosive sprays are to be applied, such iis thc^ sinii)h' solution of coppiM* sulphat(\ eau celeste, etc., it may be found necessary to pi'otect the eyes. For this purpose ordinary clear <^'lass <»()^<i*l(\s may be used, or the sprayer may provide himself with mica ^^oj^j^les of lar^e size, such as are worn in some portions of the country l)y men em|)loyed about thrashing machines. Roth the glass and the mica goggles may be usually purchased through druggists. PIBIPS FOR VARIOUS SIZED ORCHARDS. The selection of a good spray pump is advisable. The difference between the first cost of a poor pump and that of a good one is little, while the difference in the ex- pense of spraA'ing an orchard with a poor and a good pump is apt to be considerable. There are some features which everv spray pump should possess. It should be furnished with an air chamber for the regulation of the flow, and the wearing parts should be of brass or brass lined. It should be strong and work easily, be supplied with means for firm attachment, and have capacit}^ sufficient to maintain the required pressure without undue rapidit}" of stroke. Pumps for small orchards should be capable of throwing two good sprays. Such pumps, suited for attachment to the top or side of barrels, or to other raised tanks or foundations, are shown in figs. 6 and 7. These pumps are supplied with air chambers and are of sufficient capacity for ordinar}^ orchard spraying. Eacli has a con- nection for a small pipe leading down from the discharge pipe to the bottom of the barrel or tank. B}^ opening a stopcock in the pipe a stream ma}^ be forced back into t
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