Note 392 — MINERAL POISONS. (continued 3)

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.