E. Frankland on the Source of Muscular Power. 405 
Ascent of the Faulhorn. 
|__ Fick.) Wislicenus. 
Gram “Gram 
Amount of nitrogen gees in urine pe hour before ascent, 63 “61 
Weight of dry muscle co be Bie) ti nitrogen, ".. 2 cee cacs 419 405 — 
, Amount of nitrogen secreted per hour during edit. Pee eas "41 39 
Weight of dry muscle corresponding to nitrogen, Pe tes ie BL 2-56 
pp ar a secreted per hour during 6 hours after t 40 40 
the 
Weight of p5 muscle corresponding to nitrogen, .......+.- 2:63 2°63 
— of nitrogen secreted per hour during the ijlenine AB 51 
Weight of dry muscle corresponding to nitrogen, serteeeced, Ue 3°39 
Total amount of nitrogen secreted during ascent, .......... 3°31 3°18 
Ditto during 6 hours after ascent, ...:.......... ands Velreiele 243 2°42 
5-74 5°55 
Weight of dry muscle correspond- | During ascent, 20-98 20°89 
ing to nitrogen secreted, During 6 hours after ascent, | 1619 161 
87:17 37:00 
The results of these determinations add a new link to the 
chain of experimental evidence, that muscular exertion does not 
Ls atiagiely increase we aeoratioh of nitrogen through the urine. 
abstained from all nitrogenous foo uring these + irty-on 
hours they had naihing | in the way of solid food except sank, 
fat, and sugar e two former were taken in the form of cakes. 
Starch was mad with water into a thin paste, which was 
quantities usual in mountain excursions. It was doubtless ow- 
ing to this absence from food containing nithaneh that the 
amount of this element secreted th e urine, declined 
tolerably hyd from the 29th of August till the evening of 
the 30th. Even in the night of the 30th to the 31st, in spite of 
the plentiful sneak of albuminous food on the evening of the 
30th, the secretion of nitrogen was less than on the precedin, 
night. The reason of this is probably to be sought for in the 
circumstance that during the period of abstinence, the secretion 
of nitrogen was ane on iy te Dae of tissues, and now 
ur. §cr.—Seconp Serizs, Vo L. XLII, No. 125.—Nov., 1806. 
52 
