492 Drs. A. Fick and J. Wislicenus on the 



Wislicenus. 



jj , Nitrogen in Total 



the urea, nitrogen. 



Work urine. . . 6*6973 3-1254 3-1336 \.^ m 



After-work urine . 5-1020 2*3809 2*4165 J ° DDUi 



Night urine, 30th to\ k q/iao 



31st of August .J 



It is evident that the calculation of the amount of the protein 

 substances in question must be based upon the numbers for the 

 total amount of nitrogen, and therefore that, in order to render 

 the result as convincing as possible, the most unfavourable case 

 (that is, the one which leads to the greatest quantity of protein 

 bodies) must be selected. All real tissue-forming protein bodies, 

 with the exception of permanent cartilage yielding chondrin, 

 contain more than 15 per cent, of nitrogen: we are therefore 

 entitled to make this proportion the basis of our calculation, and 

 we thereby obtain the following numbers for the protein bodies 

 consumed : — 



Fick. Wislicenus. 



grms. grms. 



For night urine, 29th 1 . « t nork , A -»~„ 



to 30th of August j 4610 * grms 44-5607 



For work urine . . 22-0867"! no non „ 20-8907 



grms. 



For work urine . . 22'0867\oo. 9 n 9n 20-8907\o?.nnn? 

 For after-work urine 161953/ d8 ^° 16-1100/ 37 0UU7 



Let us, in the first place, use the figures we have obtained, 

 in order to gain an idea of the course of the excretion of nitrogen 

 through the urine during the period of the experiment. For 

 this purpose we divide the amounts of nitrogen given in the first 

 two Tables by the number of hours during which they were se- 

 creted, and we obtain, 



Average quantity of Nitrogen excreted per hour. 



During the night, 29th to 30th 

 During the time of work . . 

 During rest after work . . . 

 During the night, 30th to 31st 



By 



Fick. 



Wislicenus 



grm. 

 0-63 



grm. 



0-61 



0-41 



0-39 



0-40 



0-40 



0-45 



0-51 



