Fluid extract of eucalyptus, 2 fluidounces.

Simple elixir, 14 fluidounces.

Alcohol, 1/2 fluidounce.

Carbonate of magnesium, a sufficient quantity.

Triturate the fluid extract of eucalyptus with carbonate of magnesium in sufficient amount to form a creamy mixture, then gradually add the simple elixir, and filter. Lastly, mix the alcohol with the filtrate.

Each fluidrachm of the finished preparation will contain such proportion of seven and one-half minims of fluid extract of eucalyptus as will dissolve in that amount of the menstruum. In our opinion, the proper menstruum for extracting the medicinal principles of eucalyptus is alcohol of specific gravity 0.820. The addition of water detracts from its value as a dissolving medium, in proportion to the amount of water present. Therefore elixir of eucalyptus does not represent the fluid extract of eucalyptus employed in making it.

The proportions of eucalyptus upon which the foregoing elixir was based will be found in the Druggists' Circular, 1877.