( 283 ) 



Hence we get as conditions for the possibility of the occurrence 

 of barotropic phenomena: 



The second component must have: Tk t small compared with Tk l} 

 and by preference also: M, ^> A/, and b i2il <^ b nil . 



This becomes still clearer by the application of equations (2) and 

 (4) of Comm. N°. 79, April '02, p. 659: 



<f'g — f't 



MRT 



.vi = x g e 



MRT ~ {"p.,, dT P \ MRT 



which determine the ratio of the concentrations of gas and liquid 

 phases of a binary mixture in which the quantity of one component 

 is small, if the law of the corresponding states may be applied. 

 The connodal tangent chord will rapidly deflect from the side x = 0, 

 if the exponent of e assumes a considerable negative value. The 



1 fdT xlc \ 



greatest influence on this exerts « = — — — - — , on account ot 



Jh V djc Jx=o 



T dp„, 

 the value of the coefficient (> 7) ; so ix, will have to be small 



I'm dl 



with respect to TV. The influence of p? = a — y, if y = - — 



»*-, dx 



(cf. Comm. N°. 8J, (Jet. '02 p. 325) is only of secondary importance. 



To tend at least in the right direction, y would have to be negative, 



so baa. <inM l ). 



Physiology. — "An investigation of Mr. J. W. A. Gewin, on the 

 relation of pepsin to chymosin." By Prof. C. A. Pekelharing. 



That gastric juice possesses the power, on the one hand to digest 

 proteins under acid reaction, on the other hand, to curdle milk under 

 neutral or scarcely acid reaction, is generally attributed to the pres- 

 ence of two different enzymes in the gastric juice, viz. pepsin and 

 chymosin. This opinion is chiefly based upon an observation of 

 Hammarsten, who was the first to throw light on the changes that 

 take place in milk when it is coagulated by means of rennet. 

 Hammarsten found that an extract from the mucous membrane of 

 the stomach, which, when prepared fresh, could digest proteins as well 



*) The more elaborate mathematical treatment of the conditions for the occurrence 

 of barotropic phenomena, as sequel to Comm. N°. 96c, will be postponed till 

 further experiments call for a further discussion. 



