Papers on the plant Gynocardia odorata from which the Chaulmoogra oil is obtained / compiled from various sources by Richard C. Lepage.

Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Papers on the plant Gynocardia odorata from which the Chaulmoogra oil is obtained / compiled from various sources by Richard C. Lepage. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    colour, ^yhich chanoed after a few minutes' stirring into a ricli oliA'e green. The tenacious resinous mass was not formed as in the cold drawn oil ; its fonnation. therefore, appears to depend upon the presence of the resin of the seed, which is separated during clarification when the oil is jire- pared l)y boiling. Several commercial sain])les were now tested ^\•ith sul- phuric acid with the following results :— Descriptiou of Sample. Behaviour with Acid. Couclusions. No. 1. Colour golden sherry; consistence fluid ; no deposit ; strong odour of Cliaulmoogra. No. 2. Colour pale shei'ry ; consistence fluid ; no deposit; sp. gr. O-OlO ; odour of Cliaulinoogra not very strong. No. 3. Colour and con- sistence of commer- cial soft soap. Strong odour of Ubaulmoo- gra. No. 4. Colom' pale sherry ; consistence fluid ; no deposit ; good odour of Chaul- moogra. No. 5. Same character. Turned at first burnt sienna coloiu-, after- wardsrich ohve green; no tenacious resin- like mass formed. Turned at first burnt sienna colour, and a small resinous mass formed round the drop of acid. Upon stirring, the bulk of the oil turned a pale dirty green. Turned a du'ty greenish brown. Small resin- ous particles after- wards separated. Turned a dirty gi'eenisb brown. No resinous mass. Do. (jeuuiue oil extracted by boiling. About one-third genu- ine cold-drawn oil mixed with two- thirds of some cheap oil, probably sesame. Probably a mixture of genuine oil with some solid fat. A mixture of boiled oil with some cheap oil, perhaps ground-nut. Do. It would appear that genuine Chaulmoogra oil sho^^•s two marked peculiarities when treated with sulpluiric acid in the way above mentioned ; the oil, whether drawn cold or by means of heat, gives first a burnt sienna, and after- wards a rich olive green colour ; if drawu cold, a tenacious reddish brown resinous mass forms round the drop of acid, and cannot be mixed with the rest of the oil. Several of the common cheap oils likely to be used as