tar

(tahr) [L. pir liq’uida]. Wood-tar; a dark brown or black, viscid liquid, obtained mainly by Head of Tznia solium. Head of Bothriocephalus lat us. Segments of Tania Segments of Tania(Hymeno- Segments of Bothriocephalus saginata. lep is) souum lat us. Tenia (Hymen or pis) nana, much enlargd- Tznia echinococcus, enlarged. ᾿ ‘Tania elliptic a. Tania (Hymenolepis) nana, about natural size. roasting the wood of various species of pine. It is an oleoresin of extremely complex composition, and is the source of a number of substances, ‘as cresol, creosol, guaiacol, naphthalene, paraffin, phenol, toluene, xylol, etc. It is given in chronic bronchitis, diarrhea, and diseases of the urinary organs, and externally in certain skin diseases. Dose of tar water, freely; of syrup, 1-2 fl.oz. (30- 60 c.c.). The ointment is used for external application, coal-t., a thick, black, viscid substance obtained from bituminous coal, or as a residue in the distillation of petroleum. Its distillation product (coal-t. oil) is the source of many valuable organic compounds, including anilin, benzene, naphthalene, quinolin, toluene, etc. from the coal, rosin, petroleum, and other material used in’ gas-works.