(Take of purified oxalic acid in crystals quite dry, but not effloresced, 551.25 grains; distilled water, a sufficiency.) Dissolve the oxalic acid in eighteen fluid ounces of the water, and when the solution is complete add as much distilled water as will make its bulk exactly twenty fluid ounces at 60°.

The quantity of the solution which fills the volumetric tube to 0, includes exactly sixty-three grains of crystallized oxalic acid, and is therefore capable of neutralizing an equivalent in grains of any alkali or alkaline carbonate.

With respect to the four other volumetric solutions introduced into the Appendix, a few words of explanation may here be offered.