Characters. - A brownish-green, or dark green, somewhat viscid liquid, having a peculiar odour, a disagreeable bitter taste, and a neutral or faintly alkaline reaction. Specific gravity 1.018 to 1.028.

Reactions. - A mixture of 2 drops of ox-gall and 10 c.c. of water, when treated first with a drop of freshly prepared solution of 1 part of sugar in 4 parts of water, and afterwards with sulphuric acid until the precipitate first formed is redissolved, gradually acquires a cherry-red colour, changing successively to carmine, purple, and violet.

Preparations.

u.s.p.

Dose.

Fel Bovis Inspissatum ..............................................................

,, ,, Purification ..............................................................

8-15 gr.

U.S.P. Fel Bovis Inspissatum. Inspissated Ox-gall.

Preparation. - Heat the ox-gall to a temperature not exceeding 80° C. (176° F.), strain it through muslin, and evaporate the strained liquid, on a water-bath, in a porcelain capsule, from 100 parts to 15 parts.