Under this heading are included -

1. Partially proved medicines, some of them being already well spoken of as curative agents.

2. Medicines less known, but about whose physiological action or therapeutic value sufficient information has been obtained to entitle them to some brief notice.

It must be evident that this part of the work might have been largely extended, but the object being to secure only those medicines that promised to enrich our Materia Medica, a selection had to be made. In this way the names of many of those but little known are excluded, while others that may be said to be in a transition state are retained. Though some that were in the first edition of the Pharmacopoeia are retained that perhaps might have been left out, it is hoped that none that should find a place are thus dealt with.