302 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 



son, 111. (Plate LVI, Fig. 6), consists of a can, capable of holding about 

 eight gallons of liquid, and so formed as to rest easy on the back, to 

 which it is fastened, knapsack-fashion, by adjustable straps, which reach 

 over the shoulders and fasten across the breast. To the lower part of 

 the can are attached two rubber tubes, which are connected with two 

 nozzles or sprinklers. The inside of the can has three shelves, which 

 help to keep the mixture stirred. There is a convenient lever at the 

 bottom which presses the tubes and shuts off the outflow at will, and 

 two hooks on the sides near the top, on which to hang the tubes when 

 not in use. On the top is a small air tube and a capped orifice. 



" The Ruggles Sprinlder. — Invented by Mr. Silas Enggles, of Three 

 Eivers, Mass. (patent ]^o. 203072, April 30, 1878), is an exact counter- 

 part of Gray's Sprinkler, with the addition of a stirrer, agitated by the 

 mov^ement of the arm of the bearer. 



'^ The Townsend Sprinlder. — This was invented by Mr. George Town- 

 send, of Greenville Centre, K. Y. (patent ISTo. 2L2412, February 18, 1879) 

 and is intended, like Gray's Sprinkler, to be carried on the back of a 

 person. It consists of a tank with a stirring arrangement, but has only 

 one sprinkling tube, and sprinkles, therefore, only one row of plants." 



It is illustrated in Plate LV, Figs. 3 and 4. L is one of the shoulder 

 loops for suspending it. The can is shown in mesial section in Fig. 4, 

 while all of its interior appears in Fig. 3. D is the lid. The dashes, 

 E E, are moved up and down with the rod, D F,, by the handle, F. The 

 lever, T, is worked by a string to the hand ar^d opens the valve, N, 

 against the spring, P, to free the liquid through a pipe, G H I, termi- 

 nating in the nozzle, K, by which the spray is dixected. 



Automatic hand- sprinklers. — Under this section come naturally 

 the ordinary watering-pots or garden-sprinklei's with which all are so 

 familiar that descrix)tions seem unnecessary. Many variations on the 

 standard watering-pot have been patented, but they seldom if ever 

 appear in the trade. The use of automatic hand-sprinklers uj)on horse- 

 back has been described on page 300, and the kinds of manv punctured 

 nozzles preferable for employment on them are discussed in the chap- 

 ter on nozzles. Here it should be added that the sprinkler illus- 

 trated in Plate LV, Figs. 1 and 2, and described on page 273, answers 

 well as an automatic hand-sprinkler, usable instead of the watering- 

 pots, and generally preferable. When the basal valve is held open the 

 spray descends direct from the base. The valve may be held up me- 

 chanically by adding a hook or loop from the bail to the valve-stem, 

 and this is more convenient than to be constantly tipping the common 

 sprinkler. 



POR DRY POISON 5 SIPTERS. 



Here will be included the various sieve-machirtes or sifters, and they 

 may be grouped as (1) Reciprocating- sieve MacMnes j (2) Rotary-sieve 

 Machines 5 (3) Reciprocating- stirrer sifters, and (3) .Rotary- stirrer Sifters. 



The sifters are probably the worst machines ^for distributing dry 



