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For softening purposes a very small quantity of gum thrus may be used, too much will result in tackiness. For hardening, sandarac has its place and usefulness, although, as with the naturally soft gums and resins which return to their original condition after the solvent has evaporated, great care must be taken to use a very small proportion.
The wild, Diana-like purity and the half-savage, half-æsthetic grace have not wholly escaped him, but the color, ah I there is the disappointment. I have always nursed a fancy that there is something essential to perfect health in the bitters and sweets of buds and roots and gums and resins of the primeval woods.
Opium preparations carefully used are the best remedies. The breathing in of steam impregnated with various ethereal resins, was also recommended. He gives a rather interestingly modern treatment of consumption. He recommends an abundance of milk with a strong nutritious diet, as digestible as possible.
Many varieties of the forest trees exude resins, which are collected and used for torches and for repairing boats, as well as brought to the bazaars, where the best kinds fetch very good prices. Sometimes the resin is found in large masses on the ground where it has dripped from the trees. A curious and valuable natural product is the bezoar stone.
The males and females of all the cone-bearing plants are in separate flowers, either on the same or on different plants; they produce resins, and many of them are supposed to supply the most durable timber: what is called Venice-turpentine is obtained from the larch by wounding the bark about two feet from the ground, and catching it as it exsudes; Sandarach is procured from common juniper; and Incense from a juniper with yellow fruit.
Herminia's life through those six months was one unclouded honeymoon. On Sundays, she and Alan would go out of town together, and stroll across the breezy summit of Leith Hill, or among the brown heather and garrulous pine-woods that perfume the radiating spurs of Hind Head with their aromatic resins.
The sap being obtained, the Indians, to prevent the separation of its peculiar resins, fumigate it over a fire of the nuts of the assai palm. By spreading out the sap on a wooden scoop, and shaking it in the smoke, its coagulation is almost immediately obtained; it assumes a grayish-yellow tinge and solidifies.
The distinguishing property of the camphor oil, that it dissolves many resins, and mixes with drying oils, finds its application for the preparation of varnish. The author has succeeded in preparing various varnishes with the camphor oil, mixed with different resins and oils. Lampblack was also prepared by the author, by subjecting the camphor oil to incomplete combustion.
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