There are three forms of preparation recognized in homoeopathic pharmacy: -

1. Solution in water, in alcohol, or in mixtures of these liquids, or very rarely in ether or glycerine.

2. Trituration with sugar of milk.

3. Liquid attenuations.

These constitute all the preparations recognized by homceopathists, with the exception of pilules and globules, which, however, are merely dispensing forms of the liquid attenuations.

It will be necessary to preface the descriptions of these operations by an account of the menstrua employed in carrying them out.