J. H. Long—Indices of Refraction of Compound Ethers. 
288 
r| 
ane i 
n 
QR 
n—1 n—1 
“a: «(F) 
METHYL FORMATE, 
=60 d,)='99840 
15 | ‘9767 | 1°3460 | -3543 | 21°26 16 
16 | ‘9753 | 1:3456 | +3644 | 21°26 17 
17 | "9738 | 1:3452 | -3545 | 21°27 18 
18 | 9723 | 1:3448 | -3546 | 21°28 19 
19 | ‘9708 | 1°3443 | *3547 | 21°28 20 
20 | "9694 | 1:3438 | -3547 | 21°28 
PROPYL FORMATE, 
a dy = °918 
17 | +8996 | 1:3790 | -4213 | 37°07 17 
18 | -8985 | 1:3785 | -4213 | 37°07 18 
19 | -8974 | 1:3780 | -4212 | 37-07 19 
20 | 8962 | 1°3775 | -4212 | 37-07 20 
21 | -8951 | 1:3770 | -4212 | 37°07 21 
22 | 8940 | 1:3765 | -4211 | 37-06 22 
23 | -8928 | 13760 | -4212 | 37-07 23 
ISOBUTYL FORMATE, 
2 dy = °8854 
16 | *8697 | 1/3894 477 | 45°67 15 
17 | 8687 | 1:3889 | -4477 | 45°67 16 
18 | “8677 3884 76 | 45°66 17 
bd 8667 | 1°3879 | -4476 | 45°66 18 
ad “8657 | 1:3874 | -4475 | 45°64 19 
1 | -8647 | 1:3869 | -4474 | 45°64 20 
22 | 8637 | 13864 | 4474 | 45°64 
METHYL PROPIONATE. 
v7 = 88. dy 
_ 9277 | 1°3803 | -4099 | 36-07 17 
. ‘9271 13798 | -4097 | 36°05 18 
i — 13793 | -4094 | 36°03 19 
* “a 13788 | +4091 | 36°00 20 
ets 252 | 1:3782 | -4088 | 35°97 21 
9246 | 1:3776 | -4084 | 35°94 22 
ETHYL PROPIONATE. 
M=102 “91238 
- a 13866 | -4315 | 44°01 20 
oh oes 13862 | -4316 02 21 
ie 937 | 13857 | -4316 | 44°02 22 
ie 8926 | 1-38 4316 0 23 
ian | "8915 1:3847 | -4315 “01 24 
“0 | 8904 | 1-3842 | -4315 | 44°01 25 
26 
PROPYL PROPIONATE. 
M=116 d,—-9019 
i. bg 1°3950 | -4460 | 61°73 20 
+s ae 1:3945 | +4459 | 51°72 21 
oe 838 | 1°3940 | -4458 | 51°72 22 
+ ‘8828 1°3935 | -4457 | 61°71 23 
ae 8818 | 1-3930 | -4457 | 51-70 24 
a "8809 | 1-3925 | -4456 | 51°69 25 
“87 "3920 | 4455 | 51°68 
ISOBUTYL PROPIONATE. 
= 130 d)='*8875 
*8732 | 1:3992 | 4572 
*8722 | 1°3988 | *4572 
"8713 | 1°3984 | °4572 
"8704 | 1°3979 | *4571 
*8694 |! 1°3975 | *4572 
AMYL PROPIONATE. 
M = 144 do — “8876 
"8729 | 1°4078 | -4672 
"8721 ‘4074 | -4671 
8712 | 1°4070 | °4672 
*8703 | 1°4065 | -4671 
8694 | 1°4061 | °4671 
8685 | 1:405 4671 
*8676 | 1°4052 | -4671 
ISOBUTYL BUTYRATE. 
M=144 dy) = °88178 
"8674 | 1°4065 | -4686 
*8665 | 1°4061 | *4687 
"8655 | 1'4057 | -4688 
‘8645 | 1°4053 | 4688 
"8636 | 1°4049 | 4689 
‘8627 | 1°4045 | -4689 
AMYL BUTYRATE. 
M 58 d) = °8823 
8673 | 1°4122 | *4753 
8664 | 1°4118 | -4753 
8655 4114 | °4753 
8646 | 14110 | “4754 
"8637 | 1°4105 | -4753 
+8628 | 1°4101 | *4753 
METHYL ISOBUTYRATE 
M 2 d= 91ll 
*8893 | 1°3840 | *4318 
*8882 | 1°3835 | *4318 
*8871 | 1:°3830 | °4317 
“8860 | 1°3824 | 4316 
*8849 | 1°3819 | *4316 
*8838 | 1°3814 | *4315 
“8827 | 1°3808 | *4314 
ETHYL ISOBUTYRATE, 
M=116 d, = ‘8903 
*8697 | 1°3880 | *4461 
"8686 | 1°3875 | *4461 
“8676 | 1°3869 | -4460 
‘8665 | 1°3864 | -4459 
"8655 | 1°3859 4459 
"8644 | 1°385 4459 
59°42 
59°43 
67°27 
67:27 
67°27 
67°27 
67°27 
67°27 
67°27 
a 10 
51°72 
