ESSENTIAL OILS OF TWO SPECIES OF HOMORANTEDUS. 
195 
crude oils, possessing the chemical and physical characters 

shown in table:— 
Percentage 
Specific 

Optical 













| pete: eee: | Locality. Yield. iene a Rotation. | 
| 3/9/1917 | 26 Ibs. Broadwater 0-97% | 0-8660 | 428° 
12/5/1922 | 130 tbs. | Woodburn| 0:35% | 0-8927 | +20° | 
3/10/1922 | 1693 tbs. Stradbroke 0-76% | 0-8809 | +18:5° | 
| Island, Q. 
Be | Solubility in 80% aeanounln Sap. No. u None Sap. No. 1} hrs, hot 
20° C. (by weight). | hot. after acetylation. 
14743 | insoluble in 10 vols. | 6°16 97-65 ith 
1:4818 | — ditto | 6-11 43-17 
1:4801 ditto 6-03 31-80 

On distillation, the crude oils behaved, as follows:— 
3/9/1917 80% distilled below 180° C. at 762 mm. 
12/5/1922 50% came over between 50—70° C. at 10 mm.; 
8% distilled between 70—120° C.; and 36% between 
121—133° C. 
3/10/1922 55% distilled below 60° C. at 10 mm.; 14% 
between 60-—100° C., and 28% came over between 
120 - 135° C. at same pressure. 
Determination of the principal Terpene.—On repeated 
redistillation of the first lower boiling fractions, both at 10 
mm. and at atmospheric pressure, the greater portion, 
about 90%, distilled below 160° CO. at 772 mm., and was 
found to consist principally of d-o-pinene. It possessed - 
the following characters, viz :—Boiling point 155 — 157° ©., 
specific gravity +2 OC. 0°8627, optical rotation +40°, and 
refractive index 16° O. 1°4666. Its identity was confirmed 
by the preparation of pinonic acid:—32 c.c. were shaken 
with 67 grams potassium permanganate, 800 c.c. water, 
and 450 grams ice until the reaction was completed. On 
removal of manganese sludge, the liquid was steam distilled 
to remove unchanged terpene, and evaporated to a small 
bulk. It was then acidulated with dilute sulphuric acid, 
