( 648 ) 



denoted by 1.7.4.5 and 1.7.8.5 in Roozkboom's nomenclature '). 

 Type VII (see Fig. 1), is therefore distinguished from III in this that 



Fig. 1. 



Fig. 2. 



Fig. 3. 



Fig. 4. 



section 3 disappears ; our Fig. 3 (lacking with Roozeboom) takes 

 its place. Type VIII (see Fig. 2) is distinguished from type V in this 

 that instead of section 6 the section indicated in Fig. 4 appears 

 between 8 and 5. 



Physics. — "On metastable <tn<l unstable equilibria solid-fluid" 

 By Dr. Ph. Kohnstamm. (Communicated by Prof. J. D. van 

 der Waals.) 



In a preceding communication '■*) I discussed a point on which I 

 could not agree with the existing literature on the equilibria solid- 

 tltiid. A second point which will prove to be allied to the preceding 

 one, concerns the course of the curves which are to indicate the 



i) Loc. cit. p. 392. 



~) Proceeding of this meeting, p. 639. 



