The same kind of gas may also be obtained in smaller quantities by the distillation of tar, rosin, or pitch. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
Twelve cubic feet of gas may be obtained from one pound of tar, and ten from the same weight of rosin. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
This crude liquid is collected in barrels and taken to a distillery, where it is distilled into turpentine and rosin. 伯莎M.克拉克.科学通论.
The turpentine is the product which passes off as vapor, and the rosin is the mass left in the boiler after the distillation of the turpentine. 伯莎M.克拉克.科学通论.