Properties : Physostigmin salicylate occurs as colorless or faintly yellowish crystals, odorless and having a slightly bitter taste. It is soluble in water and in alcohol.

Dosage: 1 mg. or 1/60 grain.

It is used in the eye in solution of the strength of from 0.1 to 1 per cent. To avoid the irritation that it sometimes causes, it is preferable to give it in oily solution, or in conjunction with cocain. The following mixture may be

used :

gm or cc.

Rx Cocainae hydrochlor......... 0 | 02              gr.

Aquae dest................ 10 00                 3 ij

For hastening recovery from a miotic a drop of 0.1 per cent, solution in castor oil may be employed.