364 POULTRY PRODUCTION 



facture of egg shell, the proportion of ash is also noticeably 

 increased. The amounts and proportions of the nutrients for 

 hens in full laying as computed by W. P. Wheeler^ are given 

 in Table XXXV: 



Table XXXV. — Digestible Nutrients Required per Day for Each 

 100 Pounds Live Weight op Hens in Full Latino. 



Total dry Carbohy- 



matter. Aah. Protein. dratea. Fat. Nutritive 

 Pounds. Founds. Pounds. Pounds. Pounds, ratio. 



W. p. Wheeler'' has to say concerning these standards: 

 "These standards are not absolute and inflexible rules, for 

 such would not be justified by a thousand times the number 

 of available data. They supply a starting point and do not 

 obviate the use of judgment. Because it is found convenient 

 on account of different requirements and capabilities to 

 divide hens into two groups, it should not be presumed that 

 a hen just under five pounds in weight must always have 

 one ration, or a hen just over five pounds must always have 

 the other." 



The following stated ration is given as an illustration of 

 one which would supply the nutrients called for in the 

 standard for laying hens of the larger size: One poimd of 

 cracked corn, f piound of wheat, f pound of corn meal, | 

 pound each of wheat middlings, buckwheat middlings, and 

 animal meal, f pound of fresh bone, and f pound of young 

 green alfalfa. 



Computing Rations. — Rations are computed by trial, taking 

 the standard f eedstuffs as basal and balancing them with such 

 feeds as will supply the deficiency of nutrients. By referring to 

 Table XXXV, we find that hens in full laying and weighing 

 between 3 and 5 pounds should be furnished with 0.3 pound 

 ash, 1 pound of digestible protein, 3.75 pounds of digestible 



> Jordan's Feeding of Animals. * Ibid. 



