SECT. l] 



PHYSICO-CHEMICAL SYSTEM 



363 



S 2 °'^^ 



£ oT 0-8 - 



it'-r 



CO) 0-6- 

 3 



« E 



0-2 

 0-lb-. 



3sl 



Bialascewic ^ 

 -sSf. 



Fig. 17 that the phosphorus, chlorine, and probably sodium in 

 the dispersed phase, are intimately united there, for, however 

 great the dilution of it, they do not increase in the ultra-filtrate. 

 Magnesium and calcium, on the other hand, show a comparative 

 readiness to pass out of the dispersed phase as the dilution is increased. 

 The behaviour of the potassium is the most pecuHar, for, as dilution 

 goes on, the calculated con- 

 centration of this ion actually 

 decreases, but as the decrease 

 is slight it is probably due to 

 experimental error, and it was 

 treated as such by Bialasce- 

 wicz himself. Thus, of the 

 ions bound to the dispersed i | o-s 

 phase, the cations sodium and 

 potassium, and the anions of §? 0-3^, 

 chlorine and (presumably) 

 phosphate, are firmly attach- 

 ed, while the cations calcium 

 and magnesium are not, and 

 can easily be washed out. 

 The high proportion of phos- 

 phorus in organic combination should be remembered here. 



Bialascewicz also pointed out that the partition coefficient or ratio 

 followed with dilution a practically rectilinear course, so that some 

 idea of the ratio in the natural undiluted yolk might be obtained by 

 extrapolation. These figures so obtained are shown in Fig. 17, from 

 which it may be deduced that the ions follow the order phosphorus, 

 calcium, magnesium, chlorine, potassium, sodium, beginning with 

 the one most of which is in the dispersed phase and ending with 

 the one least of which is so distributed. 



Fig. 1 8 shows another aspect of the passage of ash from dispersed 

 to continuous phase. 



In succeeding papers Bialascewicz extended these researches to the 

 eggs of amphibia, some other fishes, Crustacea, molluscs, echinoderms 

 and annelids. He reported that the intermicellar liquid varied much 

 in its relative amount, accounting for from 20 to 63 per cent, of 

 the whole ooplasm. From the data in Table 50, however, there 

 does not seem to be a very close relation between the relative volume 



extrapolated 2 

 values for undiluted 

 ooplasm 



4 6 



degree of dilution 



Fig. 17. 



