1905-6.] Miss I. D. Cameron on A Dietary Study. 
327 
A Dietary Study of Five Halls of Residence for 
Students in Edinburgh. By I. D. Cameron, M.B., 
D.P.H. Communicated by D. Uoel Paton, M.D. 
(MS. received June 18, 1906. Read June 18, 1906.) 
CONTENTS. 
PAGE 
PAGE 
I. Dietary Standards — 
(Edinburgh, York, and 
Yoit, etc 
327 
Dublin) 
332 
Atwater .... 
328 
(c) Japanese studies 
334 
Chittenden .... 
328 
III. 
Present Investigation 
Modifications for age, sex, 
and Results 
335 
etc. . . 
331 
IV. 
Com parison with other 
II. Previous Dietary Studies— 
Studies of Students’ 
(a) Atwater’s American work 
331 
Dietaries . 
346 
(&) British investigations 
V. 
Summary of Results 
350 
I. Dietary Standards. 
In considering the steps leading up to the present dietary 
standards, it is necessary first to mention the work of Yoit and 
Pettenkofer. They constructed tables representing “ exchange 
of material ” ; these were based on the weight of the animal 
experimented on, and the amount of food taken, considered in 
relation to the work done and heat developed. 
These results may be expressed in three ways : 
(a) As energy, and stated as Calories. 
( b ) In terms of the contained nitrogen and carbon. 
(c) In relation to the nutritive materials, as proteids, fats, 
and carbohydrates. 
The method of investigation originated by Yoit has been 
followed by Playfair in England and by Moleschott in Italy. Their 
results do not differ widely. The general result is that the daily 
requirement of an average man at moderate work is : proteids, 
120 grammes ; fats, 60 grammes; and carbohydrates, 500 grammes. 
When expressed as energy, this represents 3130 calories. Given 
in another form, it is equivalent to 20 grammes of nitrogen and 
320 grammes of carbon daily. 
