1919. No. 4. A CRYSTALLOGRAPHIC INVESTIGATION OF SOME ORGANIC ACIDS. IS 
Between the inactive acid m. p. 157° and its d-component: 
100 V/, rac. acid o '/g d-acid m. p. 157° 
Ju RED > 25 > » ? 144 3 
50 » » » 5o » » » 134° 
au 3 5 » 63 » » » 133" 
25> > » 75> » "x35" 
Oo» » » IOO » » » 138 ? 
As may be seen from these curves, both the inactive acids are true 
racemic compounds. 
The racemic nature is also evident from the solubilities of the acids: 
A saturated solution of inactive acid in chloroform is not saturated on 
active acid.! 
Trondhjem 29 May 1917. 
1 Roozeboom l. c. 
