44 Proceedings of the Royal Society of Edinburgh. [Sess. 
The following molecular weights were found in aqueous solution : — 
Concentration per 
100 grams solvent. 
Mol. weight 
found. 
Mol. weight calcu- 
lated for C]^ 2 H 22 ^ 11 - 
1-35 
342-4 
342 
2-28 
342-1 
2-56 
337-5 
2-58 
348-5 
55 
3-61 
341-1 
55 
4*74 
341-1 
55 
In formamide solution the numbers were — 
1-235 
324 
342 
2-46 
327 
55 
The specific rotations {cf. figs. 13 and 14) are given in the following 
table — 
Solvent 
Water. 
Formamide. | 
Graph 
0 
Concentration 
grams in 100 
[ 2-752. 
1-8544. 
c.c. solution. 
) 
1 
Time. 
Time. 
[4U. 1 
4 min. 
+ 36-33° 
45 min. 
+ 29-65° 
9 55 
37-06 
53 55 
29-65 1 
55 
37-24 
1 hr. 15 „ 
30-19 i 
14 „ 
37-42 
1 „ 32 ,5 
30-46 ! 
23 „ 
38-51 
1 „ 49 55 
30-73 ' 
26 „ 
38-88 
2 „ 5 55 
31-27 ' 
34 „ 
39-42 
3 „ 7 55 
32-62 i 
37 „ 
39-78 
3 5, 58 ,5 
32-89 : 
45 „ 
41-06 
4 5, 33 5, 
33-43 
55 „ 
41-78 
5 5 > 5 5 , 
34-24 
1 hr. 5 „ 
42-58 
5 55 33 55 
34-78 
1 55 16 „ 
43-75 
23 5 5 5 55 
44-48 
1 55 ^9 5 , 
45-60 
25 55 7 55 
44-75 
2 „ 3 „ 
46-87 
27 5, 37 5, 
45-83 
3 „ 2 „ 
49-60 
28 55 42 5 , 
46-37 
3 „ 5 „ 
49-78 
29 55 20 55 
46-37 
3 „ 31 „ 
50-87 
47 5 , 15 5 , 
49-34 
4 „ 
51-59 
50 55 10 5 , 
49-88 
: 4 „ 37 „ 
52-32 
52 55 13 5 , 
50-15 
1 5 ,j 5 j, 
52-87 
3 days 
50-69 
1 9 55 3/ 55 
53-05 
5 „ 
4- 51-22 
22 55 55 ,5 
-f 55-23 
Constant 
Constant 
K = 0-0004. 
K = 0-00297. 
Calc, initial ra]D = 
Calc, initial F all! = 
4-29-11°. 
-1-35-97°. 
Extrapolated 
initial 
Extrapolated 
initial 
[<.K=+29-5°. 
[“]d = +36°. 
