282 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 



available for wells and cisterns, tliey are, as now made, not so well adapted for use 

 in barrels, Slc, tbougli smaller, ligbter styles of certain ones.could be manufactured on 

 tbe same general plan that might answer for tbis purpose. 



1. Tbe "Buckeye force-pumps" as now made by Messrs. Mast, Foos & Co., of 

 Springfield, Obio. 



2. Tbe pump patented by Messrs. J. M. & B. Branson, of Flusbing, Obio, in No. 

 249885, November 22, 1881, and that by Mr. B. Branson, in No. 237240, February 1, 

 1881. 



3 That issued to Mr. R. Bean, of Springfield, Obio, in patent No. 9873, September 

 13, 1881, and "Bean's self-regulating force-pump" as now made at No. 6 Loyd street, 

 Atlanta, Ga., Bird & Hannson, proprietors, No. 50 Marietta Street, Atlanta. 



4. One granted in No. 238498, Marcb 8, 1881, to Mr. D. Gilbert, of Cbambersburg, 

 Pa. 



5. That in tbe patent No. 177401, May 16, 1876, issued to Mr. D. Jobnson, of Ash- 

 land, Obio. 



6. No. 241572, May 17, 1881, granted Mr. B. C. Vanduzen, of Cincinnati, Obio. 



7. That of Mr. P. A. Myers, Asbland, Obio, issued in No. 10048, February 28, 1882. 



8. Also, tbe "Red jacket force-pump" as now manufactured by Mr. J. P. Martin, 

 of Cincinnati, Obio. 



The Agitator Barrel-pump, planned and perfected by me in my work 

 for the Department, has already been in Professor Riley^s annual report 

 as entomologist, for 1881 (pp. 159-162). The description is as follows : 



By reference to Plate XLYI, Fig. 2, the barrel, Ic, will be seen in 

 section, and some of its details, together with those of the pump and 

 stirrer, may be noticed. The fulcrum,/, has a foot below screwed to 

 the barrel. Through its top is a pivot, o, on which tilts the pump- 

 lever, I, which is similarly hinged, at h, to the top of the piston-rod, t. 

 The pump cylinder, g, is also hung upon trunnions, i, projecting into 

 eyes. In this illustration the eyes, e e, have each a neck fitting in a 

 slot cut through the stave oppositely from the side of the bung hole, 

 and beneath the stave is a foot on the eye-piece. Its neck is so short 

 that the eye is held down firmly against the top of the stave, while the 

 foot is as tight against its under surface. The length of the eye-piece 

 is a little less than the diameter of the bung-hole, into which it may 

 be inserted to be driven laterally into the slot. The slot is longer than 

 the eye-piece, so the latter may be driven away from the bung-hole for 

 a distance greater than the length of the trunnion-pivot. Then the 

 pump being inserted, until these pivots come opposite the eyes, the 

 latter may be driven back as sockets ovei' the pivots which play in 

 them when the pump is worked. To hold these eyes toward the pumj) 

 and upon the trunnions a wedge, v, is driven in the slot beyond each 

 eye-piece. Thus the pump is easily attached or removed and its union 

 with the barrel is strong and firm. Perchance it be desired that this 

 pump-hole be bunged the side slots may be wedged to make the barrel 

 tight. 



The parts of the pump being hung as described, the hinge, Z>, forms a 

 toggle-joint, and in its action causes the pump to oscillate on its trun 

 nions, its basal end swinging wider than its top, as indicated by the 

 dotted line from x to y. Upon the extremity of this swinging end is a 



