Contractions. - Sulph-iod. Su-i. Present name. - Sulphur Iodide. S2I2. Take of

Iodine .....

4 ounces;

Sublimed Sulphur . . . .

1 ounce.

Rub them together in a Wedgwood mortar until they are thoroughly mixed. Put the mixture into a flask, close the orifice loosely, and apply a gentle heat, so that the colour of the mass shall become gradually darkened. When the colour has become uniformly dark throughout, increase the heat so as to produce liquefaction; then incline the flask in different directions in order to return into the liquid any portion of the Iodine which may have been condensed on the inner surface of the vessel. Lastly, withdraw the heat, and when the liquid has congealed, remove the mass by breaking the flask; reduce it to pieces, and keep these in a well-stoppered bottle.

Characters and Tests. - A greyish-black, solid substance, with a radiated crystalline appearance. It resembles Iodine in smell, and in the property of staining the cuticle when applied to it. Soluble in about 60 parts of glycerine; insoluble in water, but decomposed when boiled with it. If 100 grains be thoroughly boiled with water, the Iodine will pass off in vapour, and about 20 grains of Sulphur will remain.

Preparation. - Trituration.

Reference. - A short proving in M. J. H., ii.

Proper forms for dispensing. - lx to 3, Trituration only. 4, dilute Tincture only. 5 and upwards, Tincture, Pilules, or Globules.