122 Proceedings of the Royal Society of Edinburgh. [Sess. 
The 1911-12 studies show variations from 1979 to 4255 Calories per 
man per day, and from 64 to 147 grams protein per man per day. 
The 1915-16 studies show variations from 2222‘8 to 4702 Calories per 
man per day, and from 61 ‘4 to 148*4 grams protein per man per day. 
The diet with the lower limit of the present dietary series was that of 
a family which was continually in straits owing to the lazy and drunken 
habits of the father. The house-mother was a very careful woman, and 
did the best she could with the money at her disposal. The food cost only 
4*7 pence per man per day, and consisted largely of oatmeal, which, how- 
ever, was insufficient in quantity. Both mother and children looked under- 
nourished, and the children were very rachitic. Four other diets are under 
2500 Calories. Three of those belong to group D, and are dealt with on 
p. 123. The other is that of the family mentioned on p. 125. 
The 1915-16 diet having the highest energy value (4702 Calories) is that 
of a family where the father was doing very hard work in a shipyard, and 
the mother worked as a cleaner — also very arduous work. Money, however, 
was plentiful in this house, and the house-mother was very careless, so there 
is a possibility that some of the food was wasted without the knowledge of 
the visitor. Only two other diets have an energy value over 4000 Calories 
per man per day, and both of these are very little above that figure. 
Comparison of — 
A. Average Energy Value. 
1911-12. 
1915-16. 
Below 3000 Calories . 
„ 3000-3500 „ 
Over 3500 ,, 
No. of Families. 
21 =44 per cent. 
17 = 35 „ 
10 = 21 
No. of Families. 
12 = 30 per cent. 
14 = 35 
14 = 35 
B. Average Protein Content. 
1911-12. 
1915-16. 
Below 100 grams 
Over „ ... 
No. of Families. 
15 = 31 per cent. 
33 = 69 
No. of Families. 
20 = 50 per cent. 
20 = 50 
The majority of the later series of studies are higher in energy value 
than those done in 1911-12. 
The protein content is not so high. Half the families instead of less than 
a third, as in 1911-12, have under 100 grams of protein per man per day. 
