[392]. The following is the method of preparing the test. Expose equal parts of sulphur and powdered oyster shells to a white heat for fifteen minutes; and, when cold, add an equal quantity of cream of tartar; these are to be put into a strong bottle with common water to boil for an hour; and the solution is afterwards to be decanted into ounce phials, adding twenty drops of muriatic acid to each.
[393]. Lambe, op. sup. cit. page 175.
[394]. On the ultimate Analysis of Vegetable and Animal Substances, by Andrew Ure, M.D.F.R.S. Phil. Trans. for 1822, part. 2.
[395]. Essay on Chemical Analysis, by J. G. Children, Esq.
[396]. Where a compound is merely separated it is called an Educt; but where it arises from a new combination of the elements it is distinguished by the term Product.
[397]. Recherches Physico-Chimiques.
[398]. On the ultimate Analysis of Vegetable and Animal Substances, by Andrew Ure, M.D.F.R.S. Phil. Trans, for 1822, part 2.
[399]. The author has already in the fifth edition of his Pharmacologia, entered so fully into the philosophy of medicinal combination, that he can scarcely feel regret at the limits of the present work not allowing him to dwell upon the subject.
[400]. The Cambogia Gutta Lin. (Polyandria Monogynia) and several species of Hypericum; Chelidonium, &c. also yield a similar juice.
[401]. The Dutch appear to have first introduced it into Europe about the middle of the seventeenth century.