8 4 



SCIENCE PROGRESS 



The mean of the three dietaries (D, E, F ) gives the following 

 quantities, omitting fractions of an ounce : 



Mean total calories per week 



Cheese .... 

 Eggs .... 

 Potatoes 



Other vegetables (fresh) 

 Pulse (dried) . 

 Sugar .... 

 Cocoa and chocolate 

 Fruit (fresh) . 

 „ (dried) . 



. 127,760 



lb. oz. 

 o 13 



12 (only) 

 26 2 



} 



7 



8 

 o 

 6 

 o 



5 



8 



4 



4 



14 



calories per man per day 



4,040 



These estimates represent the quantities of food calculated 

 to be available in this country at three different periods of time 

 for a family of six persons including four children of the ages 

 specified, if the total food of the country were evenly distributed 

 amongst the population. In all the important items there is 

 a striking similarity. An approximate average such as is 

 given above may therefore be taken as closely representing 

 the quantities of different foods available for a family such as 

 is under consideration. These are sufficient to provide a gross 

 energy supply of 4,000 C. per man per day ; but these quan- 

 tities represent supplies delivered at the port or produced on 

 the home farm. Before they reach the consumer there is an 

 unavoidable loss in distribution probably approaching 10 per 

 cent. If a deduction be made to allow for this, the balance 

 would approximately furnish 3600 C. per day as purchased by 

 the consumer, which is comparable to the 3,400 C. shown in 

 table B. 



The proportion of the total energy of the day's diet sup- 

 plied by each class of food is shown in the following table : 



Comparing these figures with those based on the actual 

 consumption of food by working-class families, the latter show 



