26 



UNIV. OF N. H. AGR. EXPERIMENT STATION 



[Bulletin 240 



The greatest difficulty in developing this apparatus has been encoun- 

 tered in securing a good type of waterproof belt capable of adjustment to 

 provide sufficient tension without running off the rollers. After several 

 years of experimentation this difficulty has now been satisfactorily over- 

 come by the use of a standard make of conveyor belting, which is composed 

 of rubber with a fabric basis. The use of this heavy, 3-ply belting has, 

 however, necessitated a considerable modification of the original construc- 

 tion of the apparatus. This belt is operated by a one-quarter h.p. motor 



Figure 6 — Diagram of apparatus for separate collection of feces and urine of cows 



The legs of 4" x 4" fir and the horizontal pieces are 2" x 6" and 24 inches apart. The 

 drainage pan, held in place by two clamps, is removable. Removable cups at the bot- 

 tom have screen strainers to prevent fragments of feces from washing down into the 

 urine bottles. 



C, chute from stall above; B, top surface of revolving belt; Ri, belt roller; R2, driving 

 sprocket; D, driving chain; S, speed reduction gear; M, motor; F, receptacles for feces; 

 U, receptacle for urine. 



having 1200 r.p.m. hitched to a speed reduction unit by which the speed 

 of the belt itself is reduced to about one revolution in two minutes. 



With this apparatus it is now a very simple matter to collect and weigh 

 urine and feces separately for any desired length of time. At [this 

 laboratory collections are made continuously from September until the 

 following May or June. The apparatus beneath the respiration chamber 

 for the separate collection of feces and urine from cows is identical in 

 design and construction to the apparatus used for this purpose under 

 the metabolism stalls. (See Plate 7 and Figs. 3 and 6.) In this case, 



