Sentence:  "Pipe <WSD>gamboge</WSD>" consists of cylindrical pieces, varying from one to three inches in diameter. Some of them appear to have been formed by rolling; but many of them are striated from the impression of the bamboo stems into the hollow of which the <WSD>gamboge</WSD> juice has been poured, ... Pipe <WSD>gamboge</WSD> occurs in all qualities—the finest and the worst specimens of <WSD>gamboge</WSD> which I ever saw having this form. ... "Lump or cake <WSD>gamboge</WSD>" occurs in masses of several pounds weight. Its quality is inferior to the finest pipe kind. 
Meaning of the word marked with <WSD> tags:  The resin of the gamboge tree; a preparation of the resin used as a pigment or for medicinal purposes. (from early 18th c.)