FACTORS FOR CALCULATING FOOD VALUES. 1<> 



TAHI.K VI 1 1 /W</i-/t'<m < <i'ne of various foods expressed according to three methods Con. 



The ails MM i ML:'' in <'.\pivs.-ing (he prod action values in Calories per 

 hmnlrMl pounds i- that the results are easily comparable, whether the 

 object f feeding i- the production of flesh, as with fattening cattle, 

 or the product ion of mu>cular energy, as with work horses. The dis- 

 advaniai:<' i~> that the unit i- so small t h at the number expressing the 

 final value i- t . lanre t o convey a distinct idea concerning it. Num- 

 ber- of live and -i\ figures are difficult to grasp readily, and though dif- 

 ference- are at t he -a me t iiue magnified the real meaning of the results 

 i^ harder-to c< miprehend with Urgr numbers than with smaller ones. 

 It i- al-> true that to the average mind not trained in scientific 

 thought the term "Caloriee per hundred pounds " is much more vague 

 than either "pounds of H.-h" gained or even the "starch value." 

 The la-t. while expressed in numbers which are as easily compared as 

 tho-c expressing pound- of fle-h iramed, is not quite so commonly 

 underwood and. thouirli readily t ra nsfer able for either flesh or energy 

 production, it has been -et a-ide, the preference being given to the 

 expression "pound- ,,f tle-h Alined per hundred pounds of food." 

 Thi.- terra i- readily undent. ...d by all who feed stock and is definite 

 and applicable in the majority of cases. 



On account ..f the-.- Pacts, the production values for each nutrient 



and for the whole food have been calculated and expressed in this 



invalidation in term- of " pounds of flesh gained per hundred pounds 



\itention mu>t be called to the fact that this term does not 



mean exactly pmmd> of live weight gained, for the latter includes 



with the L'ain in thr llcsh or fat the increase in water also and will 



therefore always be somewhat higher. However, while not exactly 



synonymous, the tuo terms are approximately the same and express 



the increase in ilesh or weight as the result of feeding 100 pounds of 



I in addition to a basal maintenance ration. 



nice the above was written, Armsby (Science, 1907, 26: 670) has proposed a new 

 unit for the energy value of rations namely, the "Therm=T," equivalent to 1,000 

 r 1,000,000 gram calories. 



