pitayin in some(pit-ah'yin). varieties of An cinchona alkaloid bark. contained pitch

The substance left behind in the distillation of tar. It is a shiny, black, solid substance which, on the application of moderate heat, becomes viscous and adhesive. It consists of fixed resin and volatile resinous principles. It was formerly official in the Br. Ph. as pix (pix nigra or pix arid a). artificial Burgundy p. A factitious product, devoid of the fragrance of Burgundy p., made by melting together p., rosin, and turpentine, or rosin and palm oil or some other fat, and agitating the mixture with water to give it the nece ary opaquene . Burgundy p. The prepared resin of Abies excels a. In commerce the term includes the prepared turpentines of various other coniferous trees. When pure, it is a somewhat opaque, yellowish brown, aromatic, strongly adhesive substance, differing from turpentine chiefly in its smaller proportion of volatile oil. It breaks with a clear conchoidal fracture, and when cold is brittle and hard, yet eventually a umes the form of the ve el in which it is kept. It is used in the form of plaster as a mild rubefacient. Canada p. Hemlock p., the prepared resin of Abies can a dens is, a hard, brittle, reddish brown, opaque, nearly tastele substance of a weak peculiar odor. It contains but a minute percentage of volatile oil. It is used like Burgundy p., but softens at a much lower temperature [Lat., pix can a dens is, U. S. Ph., 1880]. mineral p. Asphalt.The medulla, pith. [Ang.-Sax., or pic; Lat.,portion, central pix.~\ of a stemlike structure. It consists chiefly of soft, thin-walled cells, which become dry and light after the growing period.