After recrystallization of the above crystals from alcohol the
properties of the crystals compared very favorably with levo borneol,
as shown in Table III.
+Table III.+--_Comparison of properties of crystals from oil of wild
sage and of pure borneol._
------------------+----------------------+----------------------
Test. | Crystals from oil | Crystals of pure
| of wild sage. | borneol.
------------------+----------------------+----------------------
Color. | White. | White.
Odor. | Camphorlike. | Camphorlike.
Taste. | Bitter, camphorlike. | Bitter, camphorlike.
Boiling point. | 210° to 215° C. | 212° C.
Melting point. | 203° C. | 203° to 204° C.
Specific rotation.| -32°. | -37°.
------------------+----------------------+----------------------
To further confirm the above results, which seemed to indicate that the
compound was identical with levo borneol, an elementary analysis was
made.
0.1237 gram of the substance gave 0.3499 gram CO_{2}, corresponding
to 77.2 per cent carbon.
0.1237 gram of the substance gave 0.1252 gram H_{2}O, corresponding
to 11.4 per cent hydrogen.
C_{10}H_{18}O/borneol requires { 77.8 per cent carbon.
{ 11.7 per cent hydrogen.
The elementary composition substantiates the assumption that the
crystals are identical with levo borneol.