CHAP. IX.] 



THE CONTRACTILE TISSUES. 



380 



This by no means represents the total work done during the 

 ascent ; for there is omitted the muscular work of circulation and 

 respiration ; the muscular work of maintaining the upright posture ; 

 the accidental, adventitious movements of the arms, &c. ; none of 

 which assisted directly in raising the experimenters to the top of the 

 Faulhorn, but all of which would swell the products of muscular tissue- 

 waste. For 17 hours before the work began no albuminous food was 

 taken ; during this period, during the period of the ascent, and for 

 some hours afterwards, the solid food consisted of rice, fat, and sugar, 

 taken in the form of cakes, with beer, tea and wine as fluid food. 



The following diary serves to shew the relation of the urine as it was 

 collected, to the various parts of the experiment : 



The urine was analysed at the summit for urea &c. ; and sealed samples 

 of each period were again examined for the total N, in the laboratory 

 on descending. Neubauer's method was used to determine urea; and 

 Liebig's method for chlorine. 



The total N was determined by heating the urine with soda-lime, 

 collecting the NH 8 as chloride, and determining as usual with JPtCl 4 . 



From the analyses it appeared that the total elimination of nitro- 

 gen by the urine during the different periods was as follows : 



FlCK. 



A. 6-9153 



B. 3-3130) 



C. 2-4293] 



D. 4-8167 



WlSLICENUS. 



A. 6-6841 



B. 31336) 



C. 2-4165J 



D. 5-3462 



That is to say, reducing the numbers to a comparable form, the 

 excretion of nitrogen per hour was as follows : 



FlCK. 



A. 063 



B. 0-41 



C. 0-40 



D. 0-45 



WlSLICENUS. 



A. 0-61 



B. 0-39 



C. 0-40 



D. 0-51 



