II. — 45,276 °l o acide isobutyrique -f- 54,724 °/ 0 CS 2 . 
12°4 
1,09615 
1,11078 
1,01335 
-1,335 
21°1 
1,08550 
1,10011 
1,01346 
-1.346 
31°0 
1,07236 
1,08793 
1,01452 
-1,452 
in. — 68,028 
°/ 0 acide 
isobutyrique -f- 31,972° / G CS 2 , 
13° l 
1,03144 
1,04242 
1,01065 
-1,065 
20°4 
1,02316 
1,03421 
1,01080 
-1,080 
28°2 
1,01398 
1,02546 
1,01133 
-1,133 
Voici maintenant ce qui concerne 
icide isobutyrique, on a : 
l’indice de réfraction. Pou 
r. 
D. 
b. 
V. 
— 
— 
— 
— 
9°05 
1,39491 
1,39689 
1,40170 
1,40674 
25o9 
1,38782 
1,38973 
1 39446 
1,39940 
39o4 
1,38210 
1,38394 
1,38860 
1,39346 
68®4 
1,36967 
1,37145 
1,37598 
1,38064 
Pour les solutions, on a la table suivante : 
Solution /. 
n. 
n v . 
n v : n. 
A. 
t- 
= llo75 
C w = 
-0,909 
r 
1,55726 
1,57173 
1,00929 
-0,929 
0,978 
D 
1,56445 
1,57935 
1,00952 
-0,952 
0,955 
b 
1,58365 
1,59928 
1,00987 
-0,987 
0,921 
V 
1,60070 
1,61755 
1,01053 
-1,053 
0,863 
t 
= 19®5 
Cu = 
-0,930 
r 
1,55182 
1,56644 
1,00942 
-0,942 
0,987 
D 
1,55908 
1,57396 
1,00954 
-0,954 
0,975 
b 
1,57792 
1,59370 
1,01000 
-1,000 
0,930 
V 
1,59495 
1,61179 
1,01057 
-1,057 
0,880 
