ADDITIONS AND NOTES TO VOL. II. 521 



dog (fed on bread), wild boar, elephant, deer, and monkey, contain 

 no excretine, no butyric acid, and no cholesterin. 



Hiring has examined the evacuations after the use of chloride 

 of sodium, Nauheimer water, and of preparations of iron, and in 

 cases of intestinal tuberculosis, bilious diarrhoea, &c., and has 

 likewise submitted to investigation the contents of different parts 

 of the intestinal contents in a patient who died from a chronic 

 affection of the stomach. We must refer to his thesis for further 

 particulars. G. E. D.] 



(20) Addition to p. 148, line 14. A solid margarin-like fat 

 has very frequently been found in the excrements in diabetes by 

 Simon,* Heinrich,f and others. I have, however, not succeeded 

 in finding a decided augmentation of fat in the cases in which I 

 have examined the excrements of diabetic patients. The loss of 

 fat through the intestine is therefore, at all events, not a constant 

 symptom in diabetes. 



(21) Addition to p. 192, 8 lines from the bottom. LiebigJ 

 has recently adduced new and striking proofs in support of the 

 latter view. Water absorbs only 0*925^ of its volume of oxygen, 

 whilst, according to Magnus, from 10 to 13 g- may be taken up by 

 the blood ; this greater force of absorption in the blood can only 

 depend upon certain constituents, and principally, as we know, 

 upon the red corpuscles; only from l-14th to 1-1 1th of the 

 oxygen which is absorbed by the blood, and which varies from 10 

 to 13^, can be absorbed mechanically, that is to say, by the water, 

 or can consequently exist free in the blood; the remaining oxygen, 

 that is to say from 13-14ths to 10-llths, must therefore be 

 fixed by certain blood-constituents ; but this is only conceivable 

 through the agency of some chemical attraction, however slight 

 that may be. The chemical combination of oxygen with the 

 constituents of the blood may be very loose and entirely analogous 

 to the combination in which the carbonic acid exists in the blood, 

 as already described (in vol. i, p. 439). The mechanical solution, 

 of a gas is entirely dependent upon the pressure which it has to 

 sustain ; if a definite quantity be absorbed independently of 

 external pressure, and if this amount stands in a direct proportion 

 to any definite constituent of the fluid, the increase in the 



* Beitrage u. s. w. Bd. 1, S. 408. 

 t Haser's Arch. Bd. 6, S. 306. 



t Chem. Briefe. 3 Aufl. S. 419-423 [or Letters on Chemistry, 1851, pp. 332- 

 335.] 



