Mar. 



Effect of Grain Rations on Growth of Chicks 



309 



barley, rice, and hominy, to which was added enough pure butter fat and 

 gluten flour to bring the fat and protein content up to the same level as 

 that of the corresponding grain mixture fed to lot i.^ 



Lot 3 constituted the control for the two other lots of chicks. This 

 lot was kept under conditions identical with those of lots i and 2, the 

 cockerels and pullets being separated when treading began. These chicks 

 received a ration known as the standard Cornell ration.^ 



Table II presents the weekly weight and mortahty records of these 

 three lots of chicks, covering a period of 28 weeks, in which time there 

 were no unusual weather conditions or epidemics among these chicks, 

 so that these figures represent the degree of nourishment afforded by the 

 rations fed to the separate lots. 



Table III. — Effect of various diets on the growth of White Leghorn chicks 



Week. 



Lot I. 



Average weight of- 



25 cocks. 



17 hens. 



Num- 

 ber of 

 chicks. 



Lot 



Average 



weight 



of cocks 



and 



hens. 



Num- 

 ber of 

 chicks. 



Lot 3 (control). 



Average weight of — 



25 cocks. 



17 hens. 



Mean. 



Num- 

 ber of 

 chicks. 



3 



4 



S 



6 



7 



8 



9 



10 



II 



12 



13 



14 



IS 



16 



17 



18 



19 



20 



21 



22 



23 



24 



25 



26 

 27 

 28 



Cm. 



41.0 



70.4 



100.9 



146-5 



184. 1 



2s6. 6 



296.5 



363.4 



420. 6 



474.0 



518.2 



588.5 



653-4 



733-4 



795-8 



828.4 



954-9 



1,024.5 



1,077.8 



1,135-9 



1,184.6 



1,231. 6 



1,214.5 



1,204. 6 



1,215-5 



1,206. 7 



1,268.6 



1,250.4 



1,294-3 



Gm. 



39- 

 66. 

 96. 



138. 



179. 



236 



276 



318 



382 



423 



460 



523 



582 



63s 



684 



740 



790 



844 



930 



964 



1,010 



1,057 



1,055 



I, loi 



1,094 



1,079 



1,084 



1,135 



1,182 



Gm. 

 40. 2 



68.4 

 98.8 

 142. 6 

 181. 6 

 246.5 

 286.5 

 340.9 

 401.5 

 448- 5 

 489.5 

 556.1 

 617. 9 

 684-6 

 740.0 

 784.2 

 872.5 

 934-3 



1,004. 2 

 1,050- 2 

 1,097-4 

 1,144.4 

 1,135- 1 

 1,152-8 

 1,154-9 

 1,143-0 



I. 176- 5 

 1,192-8 

 1,238.4 



Gm 



106 

 124 

 148 

 ISO 

 162 

 182 

 221 

 244 

 251 

 293 

 325 

 361 

 441 

 474 

 526. 

 543 

 565 

 615 

 663 

 734 

 763 

 781 



Gm. 



231- 

 292. 

 360. 

 442. 

 496. 



537- 



630. 



674- 



812. 



902- 



953- 



980. 



1,063. 



1,154- 



1,252. 



1,295- 



1,344- 



1,396- 



1.430- 



1,442- 



1,462- 



1,480. 



1.528- 



1,560. 



1,594- 



Gm. 



Gm. 

 41.6 



70.7 



102. 6 



151.1 



211. 6 



270.5 



324.6 



398.6 



446- 2 



473- 7 



559-8 



590-4 



717-5 



792-3 



824- I 



848.8 



922. I 



998.3 



1,071.0 



1, 109. I 



1,150.5 



I. 194.4 



1.2^4-5 



1,245-1 



1,264. 1 



1,281.3 



1,301.9 



1,325-4 



1,357-5 



48 

 48 

 48 

 48 

 48 

 48 

 48 

 47 

 47 

 47 

 47 

 47 

 47 

 45 

 43 

 43 

 42 



In studying the growth record of lot i it will be seen that the average 

 weights of the pullets closely followed the control throughout the 28 

 weeks, but that the cockerels were inferior in this respect after the third 



1 At the expiration of these 28 weeks the ration was changed only by the addition of sour skim milk, which 

 brought about profound anatomical and physiological changes. The combs and wattles developed, shortly 

 to be followed by crowing and treading on the part of the cockerels. It is also of interest to note that their 

 growth was greatly accelerated. The exact figures could not be counted on because of errors occasioned 

 by change of student assistants helping in the weighings. 



' NrxoN, Clara. FUEDIng young chickens. N. Y. State Col. Agr. Cornell Reading-Courses, v. 4, no. 

 88, p. 176. 1915. 



