246 REPORT 



A large reservoir of liquid on the spout of a hand bellows would be 

 too unwieldy even were it practicable in atomizers made on this princi- 

 j)le. To remedy this in such apparatuses and prevent waste by dripping 

 I have added an automatic supply by way of a small tube leading from a 

 larger reservoir carried higher, as between the shoulders, upon the back, 

 or upon one of the handles of the bellows, or otherwise, together with 

 other features, all of which may be better explained by the figures. As 

 seen in Plate XXXII, Fig. 5, bellows, v, has a long blast-tube, i, opening 

 at € into the chamber, p. This also produces a pneumatic j)ressure 

 upon the liquid in the can, p. A jjoison-inlet, Z, connects with a rubber 

 tube from a larger and more elevated reservoir, not shown in the 

 figure. A diagonal tube, xy, has its lower part open in the proximal 

 lower angle, x, of the can, j9, while its upper end opens at a larger ori- 

 fice, yj through the upper face of the can, and preferably near its distal 

 side. This instrument is designed to be held with the pipe, i, directed 

 downwards to carry the can,p, beneath the plants sprayed. The liquid 

 horizon will then be at the lower extremity of the inlet-tube, I. Each blast 

 depresses the liquid, causing some to rise up tbrough the tube, x y, and 

 be sprayed upward by the ascending blast at s. At the same time a 

 small volume of the air is forced to enter the tube, Z, and ascend into 

 the larger reservoir, to displace water enough to restore its level up to 

 the lower extremity of the tube, closing its orifice so that no more air 

 can enter, and hence no more liquid can descend. Thus the very small 

 can, jp, is fed automatically, itself being of a very wieldy size and serv- 

 ing rather as a nozzle than as a reservoir. When a large supply of 

 poison is not needed the tube, ?, may be corked tight and the can,^, 

 is filled through the hole, y or Z, preferably by immersing the whole 

 can in a vessel of poison so the latter may enter at either of those 

 orifices. 



The liquid is drawn in quickly by opening the bellows while closing 

 its suction hole by the thumb or hand. In this device blast-pressure 

 rather than blast suction feeds the liquid out, and the blast-discharge 

 is taken preferably from a facial orifice, whence it surrounds the outlet 

 of the liquid. 



The foregoing device is quite practical, and there are no difficult points 

 in the construction or adjustment of its parts. But the ordinary me- 

 chanic finds it more difficult to construct the following machines accu- 

 rately in all their proportions, although they are no more complex than 

 those already noticed, over which they possess mechanical advantages, 

 in their operation and application, giving a preference. The principles 

 which I have introduced in these render possible the construction of 

 practicctl compound machines for deliveringtwo or more blast-sprays from 

 a single blower and a single feeder. This, also, is accomplished without 

 complexity and at moderate cost. The following examples should be 

 considered here. The simple hand apparatus in Plate XXXI, Figs. 

 (3, 7, and 8, will be described first. The internal anatomy of the feeder 



