This is another agent which is used for the purpose of emulsifying phenolic bodies with water. Mr. Collier, whose observations on quillaia appear to have originated from a study of liquor carbonis detergens, obtained equally noteworthy facts from an analysis of creolin, in which a resin soap is present. Mr. Collier prepared resin soap by boiling 3xxx. of yellow resin and 3 v. of caustic soda in 20 ounces of distilled water for two hours, replacing water occasionally. The mixture is allowed to cool, when a yellow pasty mass separates, which is drained, squeezed as free as possible from liquid, dried over a water-bath until brittle, and reduced to powder. The powder is soluble in water, and is an excellent emulsifying agent. The following are examples of its utility:

Dissolve the soap in the water and shake the solution with the oil.

Proceed as in No. I. Excellent for inhalations.

Prepare as No. I.

Sandalwood oil, creosote, and similar medicines are emulsified by this formula.

Mix the first three, dissolve, and add the water.

Camphor and menthol may be similarly treated.

The resin soap is suitable for emulsifying almost any liquid of an oily nature.