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Sample text
Two samples gave the following values:— THE CHEMISTEY OF ESSENTIAL OILS 48 Specific Gravity, ° C. Rotation, «D. Refractive Index, ° C. Ester, per Cent. Yield, per Cent. 0-8481 @ 22 - 21-6 1-4768,® 22 3-81 0-11 0-8563 @ 23 — 1-4755 ® 19 4-75 CALLITRIS GRACILIS. The leaf oil of this tree contains about 12 per cent, of esters (aceticand butyric) of borneol, terpineol, and, probably, geraniol. Pinene is the principal terpene, and traces of a phenol are present. The oil has the following characters :•— Specific gravity 0-8683 atJ20° Rotation + 8-7 Refractive index 1-4752 at 20° Esters .
44 „ 37 „ 15 „ 3 „ 0-863 1-4730 + 4° 2 8 ' nil 2. 3. 4. 156° 158° 157° none none none 1 per c e n t . 5 p e r c e n t . 11 p e r cent. 45 ,, 40 „ 18 „ 42 „ 35 „ 48 „ 10 „ 19 „ 16 „ 4 3 3 „ 4 0-8635 0-863 0-868 1-4726 1-4725 1-4748 + 9° + 4° 30' + 8° nil nil nil A very large number of samples, however, have been even more largely deprived of their middle runnings, and contain a considerable amount of hydrocarbons boiling over 180°, and also a considerable a m o u n t of acid bodies, which are absorbed by caustic potash.
Specific Gravity, °C. Rotation « D. Retractive Index, °C. Ester, per Cent. Yield, per Cent. 1 2 3 4 5 6 7 0-8729 C (L 18 0-8665 , . 18 0-8631 , , 24 0-8659 , , 17 0-8657 , 719 0-8665 , , 24 0-8782 , , 24 + 27-9° + 31-3° + 30-8° + 28-4° ° + 31-25 + 25-2° + 22-7° 1-4747® 18 1-4779 „ 16 1-4755 „ 20 1-4774 „ 19 1-4749 „ 19 1-4720 „ 24 1-4774 „ 19 16-46 11-96 12*76 12-10 13-27 14-07 14-21 0-562 0-616 0-610 0-635 0-569 0-563 0-532 TABLE II. Specific Gravity and Rotation of Fractious. Fractious. No. 1 2 3 4 5 1st.