Quinine (alkaloid), 128 grains.

Simple elixir, phosphoric acid (U. S. P., 1872), of each a sufficient quantity.

Powder the quinine, and triturate it in a mortar with two fluid-ounces of simple elixir. When a smooth, creamy mixture results, continue the trituration, and gradually add of phosphoric acid an amount sufficient to dissolve the quinine. Then mix this solution with a sufficient amount of simple elixir to make the whole measure sixteen fluidounces.

Each fluidrachm (teaspoonful) of the finished elixir contains of phosphate of quinine an amount which is equivalent to one grain of quinine.