22 
PROFESSOR POWELL’S RESEARCHES TOWARDS ESTABLISHING 
5. Oil Cummin. 
11. Oil of Anise. General Mean. 
Ray. 
Index 
observed. 
Index 
calculated. 
Difference. 
Ray. 
Index 
observed. 
Index 
calculated. 
Difference. 
B 
1-5023 
B 
1-5469 
C 
1-5043 
1-5039 
- -0004 
C 
1-5489 
1-5490 
+ -0001 
D 
1-5075 
1-5079 
+ -0004 
D 
1-5553 
1-5551 
— -0002 
E 
1-5130 
1-5136 
+ -0006 
E 
1-5642 
1-5635 
— -0007 
F 
1-5196 
F 
1-5726 
G 
1-5326 
1-5317 
- -0009 
G 
1-5904 
1-5909 
+ -0005 
H 
1-5432 
H 
1-6082 
6. Oil Sassafras. 
12. Oil of Anise. Temp 
15°-2. 
B 
1-5252 
B 
1-5486 
c 
1-5267 
1-5268 
- -0001 
C 
1-5506 
1-5509 
+ -0003 
D 
1-5312 
1-5315 
+ -0003 
D 
1-5574 
1-5570 
— -0004 
E 
1-5380 
1-5376 
- -0004 
E 
1-5661 
1-5656 
- -0005 
F 
1-5441 
F 
1-5747 
G 
1-5568 
1-5569 
+ -0001 
G 
1-5926 
1-5932 
+ -0006 
H 
1-5687 
H 
1-6103 
7- Oil Pimento. 
13. Sulphuret of Carbon. Temp. 22°. 
B 
1-5281 
B 
1-6145 
C 
1-5317 
1-5300 
- -0017 
C 
1-6176 
1-6178 
+ -0002 
D 
1-5347 
1-5348 
+ -0001 
D 
1-6272 
1-6269 
— -0003 
E 
1-5422 
1-5412 
— -0010 
E 
1-6405 
1-6392 
— -0013 
F 
1-5478 
F 
1-6521 
G 
1-5599 
1-5605 
+ -0006 
G 
1-6763 
1-6776 
+ -0013 
H 
1-5719 
H 
1-7009 
8. Kreosote. 
. 
14. Sulphuret of Carbon. Temp. 12°. 
B 
1-5327 
B 
1-6234 
C 
1-5341 
1-5344 
+ -0003 
c 
1-6258 
1-6268 
+ -ooio 
D 
1-5387 
1-5392 
+ -0005 
D 
1-6369 
1-6361 
— -0008 
E 
1-5457 
1-5455 
— -0002 
E 
1-6496 
1-6485 
— -0011 
F 
1-5520 
F 
1-6616 
G 
1-5645 
1-5646 
+ -oooi 
G 
1-6864 
1-6870 
+ -0006 
H 
1-5762 
H 
1-7103 
1: 9. Balsam of Peru. 
15. Oil of Cassia. 
B 
1-5846 
B 
1-5885 
C 
1-5869 
1-5869 
•0000 
C 
1-5918 
1-5913 
— -0005 
D 
1-5931 
1-5935 
+ -0004 
D 
1-6017 
1-6000 
— -0017 
E 
1-6029 
1-6028 
— -0001 
E 
1-6155 
1-6135 
- -0020 
F 
1-6130 
F 
1-6295 
G 
1-6336 
1-6336 
•0000 
G 
1-6607 
1-6646 
+ -0039 
H 
1-6533 
H 
1-7002 
10. Oil of Anise. Temp. 21 0, 2. 
B 
1-5452 
c 
1-5473 
1-5473 
•0000 
D 
1-5533 
1-5533 
•0000 
E 
1-5623 
1-5615 
— -0008 
F 
1-5705 
G 
1-5883 
1-5887 
+ -0004 
H 
1-6061 
—J 
