264 REPORT 4, 



This brand of pump, so far as it has come to my notice, is single-acting. 

 It lias enjoyed a large sale and given satisfaction, especially for broad- 

 cast spraying upon the cotton crop. 



Pumps having the same external patteru, but a double-acting, inter- 

 nal construction , and now sold under the name '•'HydronetteSy'^ throw a con- 

 stant spray or solid jet, and are hence preferable instead of the single- 

 acting ones, which discharge by interrupted spurts. The double acting 

 hydrouettes have for some time been manufactured by Messrs. R. T. 

 Deakin & Co., northwest corner Twelfth a-.d Buttonwood streets, Phila- 

 delphia, Pa., and by Messrs. Eumsey & Co., Seneca Falls, X. Y. The 

 ordinary price for the "Fountain Pumps *' and " Hydronettes " has been 

 from $8 to $10. 



Some double-acting Hydronettes devised by myself have increased the 

 simplicity and utility of these instruments, while rendering them some- 

 what cheaper and more efficient. The construction is essentially the 

 same as that presented afterward in the barrel-pump in Plate XLYI, Fig. 

 2, and its description • but the arrangements of the base valve and some 

 other details are different. The removable extension-tube bearing the 

 spray -nozzle, which is directed straight ahead or laterally, with reference 

 to the delivery pipe, at any angle desired, is invaluable on account of the 

 quality of the spray and because the poison is thus delivered at such 

 a safe distance as not to endanger the operator, while its adaptability 

 suits it for applying the spray to the under surfaces or otherwise as 

 may be wished. This device has three interchangeable nozzles, which 

 are free from the ordinary difficulty of clogging. The pumi) is also fur- 

 nished with the same discharge- devices connected with the cylinder in- 

 stead of with the moving piston as in Plate XL, Fig. 6. This enables 

 the jet to be held steady, whereas the reciprocating motion of the noz- 

 zles unavoidable with the other pumps already referred to is annoying, 

 and in poisoning under surfaces much poison is thereby misapplied and 

 wasted. The use of the device is also illustrated in Plate XXXIX, Fig. 

 2, where Ti is the poison-cau hung on the shoulders, r its opening, h a 

 suction-hose from the interior to the cylinder, c, moved back and forth on 

 piston, .r, which is held lirm by the right hand and with its extension- 

 pipe, X u, holds the nozzle, ii s, to direct the spray, u s. The nozzles are 

 also shown in Fig. 3 and Plate XL, Figs. 5 and 6. By another arrange- 

 ment, Plate XL, Fig. 6, above alluded to the extension-pipe is attached 

 at n angle to the side of the discharge end of the cylinder and the suc- 

 tion-hose coupling is at an angle, or preferably a curve, diverging to 45'^ 

 or more, to allow the hose to hang at an angle with the cylinder without 

 kinking. 



Where one and the same person must at the same time direct the 

 spray and also do the pumping, the telescope pumps, or hydronettes, 

 are preferred to the "aquapults," "aquaject," and all other forms of 

 pumps. Xo other pumps allow the operator such freedom of action or 

 facility in applying the spray in any direction or position without con- 



