230 



ble resistance to the fluid forced through it. In the figure the tubular 

 arms, i ^, are joined to the angle-piece by the flexile sheath couplings, 

 e Cj having stout wraps. To prevent the joint thus formed from being 

 too flexile, and to give it additional elasticity, a rod of spring metal 

 extends inside. These spring rods cause the arms to spring to the 

 sides of the cotton plants and the fork to swing or close as pressed 

 upon by the row or not, and thereby conform the positions of their ter- 

 minal nozzles, n 7i, to the variable width or courses of the rows, to apply 

 the same to discharge diagonally, or from the center of each plant, up- 

 ward into its foliage. 



The nozzles may be joined inflexibly or by an elastic union with sheath 

 ;and spring rod, or in any of the flexile parts named spring-lined suction- 

 Jiose or a torsion spring, to allow i^artial but not complete rotary move- 

 .ment, may be employed. Each terminal arm forms a supply tube to its 

 inozzle chamber, which has an eccentric inlet-passage, from the same 

 Ttangentially through its wall, admitting the fluid so eccentrically that 

 it whirls in the chamber and discharges through a side outlet in the 

 form of a spray. The whirl thus produced is very intense and gives the 

 ifluid such centrifugal motion as will disperse it broadly from the orifice 

 and thus produce a very finely atomized spray. The spraying power 

 varies with certain details in the proportions and construction of the 

 passages and other parts. With a suitable straining device in the base 

 »of the pumj), bodies large enough to clog the small outlet cannot enter, 

 but, should clogging materials enter otherwise to interfere with the 

 'discharge, the face and back of the chamber may be easily taken apart 

 ■to remove matters from the interior. The nozzles project so little be- 

 .yond the supply-pipe as hardly to catch upon the plants, and in case 

 :any objection be raised to the slight recess sometimes occurring between 

 the chamber and its pipe, that may be filled completely by metal. This 

 same nozzle is used with equally good eft'ect on other pipes, hydronettes, 

 ■syringes, or pumps, as well as on blast atomizers, and is unsurpassed 

 3for spraying diagonally or upward, as here desired. 



The final peculiarities of the nozzles and distributing parts of the 

 imachine just described have been attained in the course of extended 

 •experimentation in my work under Professor Eiley, and I have com- 

 bined them with each other, with various forcing media, and with means 

 'Of support and conveyance in some of the ways which seemed to me 

 practical. Before noticing other examples of their ai)plication it will 

 he well to consider their internal anatomy more carefully here. For 

 this purpose attention may be directed to Plate XLIX, Figs. 2 to 7. 

 Plate XXXIX, Fig. 4, illustrates the form of fork used in the compound 

 machines represented in the plates cited, while Plate LXIX, Figs. 2 to 

 7 present several modifications of the fork and its parts as planned and 

 tested bj^ myself. 



Eeferring to the figures cited the parts may be explained as follows : 

 h is the coupling or segment of hose or other suitable material, and t is 



