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Exudation

— While this is a very common tree with us, I have found no resin upon it; but should be looked for for scientific reasons. The following references are interesting:— Podocarpus ferruginea yields a dark red-coloured gum resin. (G. Bennett, Wanderings of a Naturalist, p. 415.)

See also "Podocarpic Acid (Watts Dict., VII [2], 1657.)

Amongst the natural products collected by Dr. T. E. de Vrij, during his stay in the Isle of Java, Was crystalline resin produced from Podocarpus cupressina or P. imbricata, a tree common in the forests of Java, and known locally by its Malay name of Djamoudjou. This resin, when treated with alcohol,


  ― 89 ―
yields a white crystalline acid substance, which has been called Podocarpic acid. The last number of the Journal für praktische Chimie contains a long paper by Herr A. C. Oudeman, junr., in which he describes the results of his studies of this acid, and of several of its salts and derivatives. (Jour. Soc. Arts, XXII, 864.)
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