I. The Phenylglycerinic acid C;H,:CHOH-CHOH-COOH 
m. p. 122? and its optically active components. 
According to theory, the Phenylglycerinic acid C,H; . CHOH . CHOH . 
COOH, is to be found in two different inactive forms, each of which may 
be separated into two optically active components. The constitutional 
formulae of these acids are as follows: 
CH; C,H; CH; CH; 
H—C—oH OH—É-H ae 0H re 
D n H—C-0H H_C_0H eee 
COOH COOH COOH dooH 
I II 
In 1914, Prof. C. N. Riiber succeeded in separating one of these ın- 
active acids (I m. p. 141°) into its two optically active components.! 
A thorough crystallographic investigation of this 141° acid and its 
components was made in the same year by Prof. V. M. Goldschmidt.? 
During the past year Prof. Riiber and I? have separated the other 
inactive form of the Phenylglycerinic acid (II m. p. 122?) into its opti- 
cally active components. The crystallographic investigation of these acids 
was carried out by myself in the organic-chemical laboratory at Norges 
Tekniske Heiskole in Trondhjem. 
1 Ber. d. deutsch. chem. Ges. 48,823 (1915). 
2 Zeitchr. f. Kryst. u. Min. 55,123 (1915). 
3 Ber. d. deutsch. chem. Ges. 50,893, (1917). 
