Fig. 1. 
form oi the L or B solubility curves, respectively, with this 
difference however, that a solution of the inner composition as 
represented by P can be also in equilibrium with R; in other words 
sueh a solution is obtained by shaking water with an excess of 
^~b P>, or R -j- L or L B. The zone of the partial racemate 
(«) in presence of solution is at this temperature limited to the point 
"y ^ a lower temperature this point extends to a line AW 1 , 
A n B If , A In B In etc. In the points A 1 , A n etc. the liquid is saturated 
with L -j- R } j n the points B 1 , B 11 etc., however, with D -f- R. The 
points of the lines PA and PR, therefore, indicate the inner com- 
to D and L, of the solutions of L -j- R and B R 
different temperatures. 
same also relates to the points on the line PC as regards 
The 
tl ‘ e Nations saturated with D+L. The knowledge of the form 
l ^nes PA, PB, and PC gives a complete insight into 
e stability phenomena of the double salt in presence of solution. 
T to the temperature 4 the partial racemate (i?) can give solutions 
^ ose composition as to B and L is aequimoleeular, above 4 the 
nf , a nce begins to decompose with separation of the least soluble 
components (the line OR, which indicates the composition of 
then 
intersects the solubility line of L 
we obtain solutions 
