262 
[Sess. 
Proceedings of the Royal Society of Edinburgh. 
But to return. Glycerine is 
0 
OH 
H 
C • 
0 
OH 
o 
O •' 
OH 
H 
, and glyceric acid 
: O' " 
OH 
c •• 
H 2 
C " H 2 
c. 
H 2 
"O'' 
OH 
G-O 2 
C--Q- 
OH 
Glucose has been perhaps too little investigated to afford data sufficient to 
determine definitely its formula. Taking, however, mucic and saccharic acids as 
starting-points, these bodies may be meanwhile represented as : — 
H \ 
C O OH 
H 
C 
0 OH 
H 
(V 0 OH l the acids. 
H 
C. 
c. 
c 
0 OH* 
O 2 
O 2 
0 • OH 
0 OH 
Glucose. 
( 
G 
C. 
C: 
C 
C:' 
H 
0 OH 
H 
0 OH 
H 
0 OH 
H 
0 OH 
H 
O ' OH 
H 
0 OH 
C H 
V 0 OH 
It will thus be seen that these combinates all belong to type nCM 4 . 
* This “ OH ” is omitted in the original, 
f The oblique dotted line here is omitted in the original. 
X The vertical dotted line between the “ C’s” is omitted in the original. 
