816 
and for the number, the length and the colour 
of the staminodes, the proportions of the phae- 
notypes differ widely in the different sowings, 
in spite of the fact that the FJ consisted of a 
single individual; so that the segregation of 
the hybrids is variable; 
2) that in none of the sowings the segregation 
ratios correspond to those which may be expected 
from an independent Mendelian segregation. 
Chemistry. — “Jn-, mono- and divariant equilibria’. XII. By Prof. 
F. A. H. SCHREINEMAKERS. 
(Communicated in the meeting of November 26, 1916). 
19. Ternary systems with two mdifferent phases. 
In communication I] we have seen that in ternary systems three 
types of P,T-diagram [fig. 2 (II), 4 (II) and 6 (II)] exist. When, 
however, two indifferent phases occur in the invariant point, then, 
as we shall see further, four types of P,7-diagram exist. 
When in the invariant point two indifferent phases occur, then 
consequently there are three singular phases, they are represented 
by three points, situated on a straight line. In the types of concen- 
tration-diagram of figs. 1, 3, 5 and 7 the indifferent phases are 
represented by A and 5, the singular phases by C, D and £. 
In figs. 1 and 3 A and B are situated on the same side, in 
figs. 5 and 7 on different sides of the line CDE. 
In fig. 1 the prolongation of the line 45 intersects the prolon- 
gation of the line HDC, in fig. 3 the prolongation of 45 intersects 
the line CDE in a point between ( and D. [Of course the type 
of concentration-diagram of fig. 3 remains unchanged, when the 
point of intersection was situated between D and £|. 
In fig. 5 the point of intersection of A5 and CDE is situated 
on the line CDE, in fig. 7, however, on the prolongation of the 
line CDE. 
Of course a type of P,7-diagram belongs to each of the four 
types of concentration-diagram, they are represented in the figs. 2, 4, 
6 and 8. We find in each of these diagrams: 
the three singular curves: 
M= HDE 
(A) = B4+C04+D+H=6+4+ (M) 
(B=ALC+D+AFLE=A+ MN 
