CHA ts mo : bot + {| hn 734 
ation: Ration 
Periol Period l: 
aise sige Wheat | 
are Date Boles ee Rolled Oats 
(Pe on £ | 
Meaty : i\3e7 per cont of salt mix- | 
Periot |tare 185 was added to the | 
) He Lo 4G ‘ 
to 
f ; cS a i | 
| 
7 | | | 
7 H | | 
160 os a 
/ pe ae | | / 
ae | | | | 
7 : | 3 | Y | | 
Tek yr Po ee wel eee 
pes Weeks } . | | 
CuHarrT 1. aon, 970. These eae show that young rats are unable to grow on a mixture of equal parts of whole 
wheat, maize, and rolled oats, together with butter fat to supplement the small and inadequate content of fat-soluble 
A in these seeds. In Period 2, the addition of 1.0 per cent of sodium chloride induced a slight acceleration of growth. 
That the cause of the slow growth rests in the inadequacy of the inorganic content of the ration, is made evident by — 
the records of Lot 959, Chart 2. 
Lot 971. These curves show that the addition of calcium alone (Period 2) to mixtures of wheat, maize, and rolled oats 
does not permit growth on this seed mixture. The seeds which we have studied are without exception too poor in cal- 
cium, sodium, and chlorine, and all must be added before growth can approximate normal and be long sustained (com- 
pare Lots 970 and 714, Chart 1, and 959, Chart 2, respectively). The protein content of this mixture of seeds is not of very 
good quality and the plane of protein intake of animals on this and the closely similar ration ‘described is below the 
optimum but suffices to support normal growth over a considerable period (compare Lot 714). 
Lot 714. These records illustrate that the addition of 3.7 per cent of a complete salt mixture, in Period 2 after 6 
weeks of complete suspension of growth, enabled the animals to resume growth at nearly the normal rate on a diet 
of equal parts of wheat, maize, and rolled oats. The first limiting factor in this mixture is its inorganic content, and 
sodium, chlorine, and calcium are the only elements which need to be added. We have abundantly demonstrated 
that these three seeds are too poor in the fat-soluble A to support normal health over a prolonged period. The quality 
and amount of protein furnished by this seed mixture are below the optimum, but the effects of this would not become 
manifest except perhaps in failure of the animals to attain the full adult size, or in case the special burden of repro-: 
duction is placed upon them. 
