Jan. 2. 1920 Meat Scraps versus Soybean Proteins 393 



trouble was experienced, and practically all the remaining chicks devel- 

 oped in a normal way. See figure i . 



OBJECT OF EXPERIMENT 



The object of this experiment was to determine the value of corn 

 protein in the growth of chicks when the proteins were fortified with 

 sufficient ash and with fat-soluble vitamines, as compared with their value 

 when supplemented by var3dng amounts of proteins derived from meat 

 scraps or soybean meal or from these proteins in combination. 



PLAN OF PROCEDURE 



The stock used was 210-day-old White Leghorn chicks from the 

 Purdue Poultry Farm. The chicks were hatched May 6 and divided 

 into 14 lots of 15 chicks each. The initial individual weights of all the 

 chicks were recorded on the sixth day, when all lots were given their 

 respective rations tabulated in Table I. During the first 6 days all lots 

 were given only granulated com, grit, and water. Individual weights 

 of the chicks were taken every 14 days after the initial weights were 

 recorded. Each ration was "weighed back" on the same day the 

 chicks were weighed in order to obtain the feed consumption for each 

 period of 14 days. The growth period of the experiment was closed at 

 the end of 26 weeks, but the pullets were kept for a longer time to note 

 results of egg production. 



The method of care and management of the chicks was that which is 

 generally advocated for the successful rearing of chicks. Since the 

 chicks were confined in pens 4 by 6 feet during the entire experiment, 

 special effort was made to feed them so that they would be active as 

 much of the time as possible and thereby avoid the evils of overfeeding. 



Table I gives the rations, in part by weight, received by each lot. 



In addition to these rations, each lot received water, grit, oyster shells, 

 and about 75 gm. of the tops of sprouted oats. Oat straw was used for 

 scratching litter. Lot 13, used as a control pen, received the basal 

 ration only. The ash mixture was omitted from the ration of lot 2a as a 

 control on the ash; otherwise this lot received the same ration as lot 2. 

 Since there was no appreciable difference in the results obtained from 

 these two lots, no further reference will be made to lot 2a. In each case 

 the amount of protein concentrate (meat scraps or soybean meal) added 

 to the basal ration is based upon a definite amount of crude protein from 

 that source as shown in Table I. The amount of protein concentrate 

 used depended upon its content of crude protein as determined by 

 chemical analysis. Chemical analyses were made also of the other 

 feeds which entered into the rations. The same feeds were used during 

 the entire experiment. 



