FOODS HUMAN NUTRITION. 8f)l 



|)iM|icrl.v siie.-ikinu, sluuihl l>c called lacto-vc.ucl.-U'iaii. as milk. 1 nit Icr. cheese, p.iCSS, 

 and liDiiex' were ealcii as well as veuetaljk; foods. 



Ill addition lo dietary studies with '.i ehildfcii from .". to 7 years old. the 

 balance of Income and ontuo of nitro.iien was detenniiied. in the first two tests 

 there were piins of '2.'2:', and 1..")<! fiiii. iiitroi;en jter day on a diet furnishing 

 respectively 8.07 and .").:;(; i^m. of nitrou'en. TIk^ eneriiy supplied per kilofirani 

 per day was 104.(> and Kio calories resiiectively. In later tests there were 

 j;ains of 0.47 and ().(>.") j;ni. nitroi,'en per day resjiect ively on an income of 4.70 

 and r^'M) j-Mii. The enertry sujiiilied per kiloi^'iani jier day was 70.8 and 89.2 

 calories. 



As jiointed out by the authnr, the diet sui)i)lied at the institution did not differ 

 materially from the so-called mixed diet of the rei,'ioii. and was. indeed, doubt- 

 less nioi'e generous, as most of the workiiii; ]ieople live on vej^etable foods, with 

 some milk, and very seldom haxc meat. 



The results are discussed in (•(Unparison with those obtained by other inves- 

 ti.!,'ators. 



A dietary study of five halls of residence for students in Edinburgh, 

 1. I). C.wiKKox (I'ror. Roy. Soc. Ediiih.. ,iii { l!)(i.')-i;) . \ii. .',, pp. .in-.l'il). — The 

 dietary studies were made in 4 meifs clubs and 1 woman's club and were each 

 of 1 week's dui'ation, a total of 110 men and 00 women bein.i; included. 



Tht> diet on an average snp|ilied 14."> sni. i»rotein. l."?8 f^m. fat. and .">11 sm. 

 carbohydrates. tli(> fu(>l value beint,' .■!.!)7'.» calories. The average cost of the 

 food |ier man per day was :',() cts. Animal protein constituted 03 per cent of 

 the total and animal food made up 00 per cent of the entire cost. The waste 

 varied considerably, its aiijiroximate cost beiuff from 2.4 per cent to 7 per cent 

 of the total sum expended for food. 



Metabolism on insuflacient diet, I-IV, V. N. Schulz, E. Mangold, II. Sturel, 

 :md E. IlEMPEL {Anil. I'hijsioL \l'pU(ivr\, IIJ, (HXIH). Xo. !)-10. pp. .',19-.'iH6, 

 till. 1). — Investigations carried on by Schulz's students are rejtorted and sum- 

 marized. The principal conclusions follow: 



The experimental data furnish additional demonstration of the fact that the 

 or.s;anism of a fasting dog can lose so inuch fat that the nietabolism of ])rotein 

 is increased. On insuftici(>nt di(>t the total metabolism may be reduced to half 

 tb(> normal. Fasting induces disturbances which can not be attributed to a lack 

 of energ.v-.vielding food or to the fact that no more body jirotein can be sjiared, 

 but which are ai)])arentl.v caused by a kind of auto-infection. These disturb- 

 ances disappeared when a small amount of food was su])])lie(I. 



.Additional exi)erinients are needed to stnd.v the nian.v conditions which affect 

 nitrogen metabolism in fasting. 



Problems in animal metabolism, .1. P.. Le.\tiies (London: .John Miirrai/, 

 nidi;, pp. >.():,: nr. in I'lil). Ilrdllh \l,<inih>n\. I'.i {lUnl). \o. .',. />. .!.!'7). — This 

 course of lectures, delivered at London University, summarizes r<'cent investiga- 

 tions and older work in metabolism and discusses available data with reference 

 to various iirobleins concerned with he.-iltb and disease. 



The effect of consuming different amounts of calcium and magnesium 

 upon the metabolism of these constituents and the quantities present in 

 the animal body, S. Coitie.n (Anh. I'fii/siol. \ I'fliii/cr]. 11:' (IHOC). \o. 1-2. 

 pp. ]}S-1.',1). — According to the investigations (which were made with rabbits) 

 an al>uiidance of calcium and magnesium in the diet induces a storage of these 

 constituents in the body while a deficiency of calcium and magnesium lowers 

 the body store. The changes are especially noticeable in bones and the mus- 

 cular system. The variations in magnesium content of the other organs is 

 particularly small. 



