1918-19.] 
Researches in Optical Activity. 
Iso butyl Dibenzoyl-d-tartrate in Cinnamic Aldehyde. 
'p — 9"548. 
t . . . 0° 15*7° 17° * 42° * 57-5° 60° * 79° * 100°* 
• d . . . 1-0738 1-0617 1*0609 L0417 1*0298 1*0276 1 0128 0-9974 
* Experimental. 
Length, of tube used, 50 mm. 
t. 
| a (100 mm.). 
14 
[M], 
Q 
o 
Q 
Q 
£1 • 
0 
- 3*482 
-33*96 
-159-6 
15-7 
3*772 
3721 
174-9 
57-5 
3*782 
38-46 
180-7 
100 
3-512 
36*88 
173-3 
?* 2 .. . 
0 
-4*284 
-41-78 
-196-4 
15*7 
4-582 
45-20 
212-4 
100 
4-252 
44-65 
209-8 
y 
0 
-5-262 
-51-32 
-241-2 
15:7 
5-542 
54-67 
256-9 
57-5 
5-628 
57-23 
269*0 
100 
5-196 
54-56 
256*4 
g • • 
0 
-6-230 
-60*76 
-285-6 
15-7 
6-610 
65-20 
306-4 
57-5 
6-658 
67*70 
318-5 
100 
6-144 
64-51 
303-2 
b 
0 
-8-666 
- 84*52 
-397-2 
15-7 
9-194 
90*69 
426-2 
57*5 
9-174 
93-29 
438-4 
v . 
100 
Unreadable, i 
8-528 
89-54 
420-8 
VOL. XXXIX. 
3 
