17 



CAUTION. Do not hastily conclude that our consumption of sugar may 

 be unlimited, or that the more sugar we swallow the higher will be the degree 

 of energy we attain. 



More information on this point will be given later on ; meanwhile remember 

 the profound truth of St. Paul's behest " to be temperate in all things." 



MAKE A MENTAL NOTE OF THIS FACT, HOWEVER: 



The starved or ill-nourished individual is incapable of good or prolonged work, 

 mental or physical, because he is insufficiently supplied with the fuel-food 

 which constitutes the foundation of bodily energy. Here is a good illustration 

 of the fact: 



Concern was excited, some years ago, by the poor physical condition of 

 the children at the Duke of York's School in London, an asylum founded for 

 the orphans of soldiers. The fault lay partly with the overcrowded dormi- 

 tories, partly, it was thought, in the prolonged hours spent in school. More 

 sleeping accommodation was provided and book-learning was reduced, one-half 

 of each day being given to manual training in workshops and to physical 

 drill. Imagine the committee's disappointment w^hen 



THERE WAS AN IMMEDIATE FURTHER DROP IN THE AVERAGE 

 HEIGHT AND WEIGHT 



of the already undersized and delicate children, who seemed, in some way, 

 conscious of their deficiencies, for, out of 460 boys, eighty besieged the 

 dispensary every day, asking for cod-liver oil. No pains were spared to 

 discover where the error lay in their management ; and at last the true cause 

 was found. 



The children were being called upon for an amount of work quite beyond 

 their strength, and certainly beyond the energy furnished to them in their 

 diet. Calculation showed that 



THE ENERGY-PRODUCING FOOD SUPPLIED WOULD SUFFICE FOR 

 ONLY HALF THE AMOUNT OF WORK DEMANDED OF THEM. 



The boys were getting too little body-building material and too little fat. The 

 little fellows begged for cod-liver oil, not alone for its own sake as a fuel-food 

 (though naturally they were ignorant of this technical fact), but because a 

 slice of bread and butter was usually given with it ! 



Directly an adequate diet was supplied the cod-liver-oil appetite vanished, 

 and the children gradually gained in health and energy. 



Readers may be interested to know, by the way, that 



THE AMOUNT OF WORK DONE BY THE BODY CAN BE AS 

 ACCURATELY MEASURED AS THAT DONE BY A MACHINE. 



When this calculation has been made, it becomes comparatively easy to 

 estimate just the amount of fuel or energy-producing food needed by the 

 worker. Be pleased to note, however, the precaution exercised by the word 

 " comparatively" The reason for its use leads, us on to the third and most 

 important test of all for food-values, viz. : 



THE PHYSIOLOGICAL TEST. 



This test approaches the subject by putting the following series of 

 searching questions to every foodstuff, or food-fad, or much-advertised patent 

 preparation, as it passes them in review : 



