A HARD-WORKING DIET. 443 



BHenz, yet there is an hotel on its summit Besides, 

 it can be ascended by a very steep path, which was, 

 of course, favourable for our experiment, because the 

 amount of muscular action which is lost and not 

 calculable (being reconverted into heat) is thus 

 reduced to a minimum. We chose the steepest of 

 the practicable paths. . . . [The details of the experi- 

 ment are then given.] 



In order to diminish as far as possible the unne- 

 cessary consumption (Luxus consmntion) of albumen 

 during the experiment, they took no albuminoid food 

 from midday on August 29 until 7 o'clock in the 

 evening of August 30. . . . 



The experiment proper began on the evening of the 

 29th of August at 6 P.M. and ended at 6 A.M. August 

 3 1 st. The composition of the products of the body 

 leaving through the kidneys during that time was sub- 

 sequently strictly analysed, and the results obtained, 

 too long to give here, furnished a new testimony to 

 the fact, which has often before been experimentally 

 proved, that muscular exertion does NOT notably in- 

 crease the quantity of nitrogen in such products. 



Note to p. 352. 



In the case of the Great Western Railway referred 

 to > P- 35 2 > when in 1872 500 miles of rails were 

 shifted within a fortnight, the extra nitrogen, together 

 with extra carbon supplied, was in the form of oat- 

 meal. The men carried their own bacon, bread, 

 cheese, cocoa, &c., as usual ; but a pound-and-a-half 

 of oatmeal (see the value of oatmeal on p. 360), and 

 half-a-pound of sugar was allowed daily to each man, 

 and for each gang of twenty-one men a cook was 



