Obviously, again, such an amount of food would be too much for some men 

 and perhaps too little for others. It would depend upon their build, their occupa- 

 tion, and so on. 



Consider the difference between the work of a harvester on the prairies and 

 a merchant in his office. The one works very hard with his muscles and compara- 

 tively little with his brain. He uses up much energy in his hard work and 

 produces as a result much bodily waste. He requires, therefore, relatively laip 

 amounts of body-building and energy-producing foods. The merchant's brain, on 



the contrary, is intensely active; his thoughts are concentrated on many anxious 

 problems, whereas his muscles get little exercise. Consequently, he needs less 

 food than the harvester and of a somewhat different kind, for brain-work, however 

 strenuous, does not wear away the body as does muscular exertion. 



THREE USEFUL LESSONS MAY BE LEARNT 



from a study of these specimen diets : 



(1.) The reason why our daily consumption of food is divided into meals ami 

 not eaten all at once: 



S 



