The repertory, published in 1896, was the culmination of Dr. Knerr's five years of labor to organize Hering's vast collection of verified symptoms. It is rooted in the philosophy that a symptom only gains "guiding" status once it has been verified through repeated clinical cures.

: While the Materia Medica offers a synthetic view of a remedy’s unity, the repertory provides an analytical separation for ready reference.

: It preserves the original language of provers and clinicians, avoiding the "vague generalization" found in more interpretive repertories.

The , primarily compiled by Calvin B. Knerr , stands as a bridge between the raw data of drug provings and the practical needs of the bedside clinician. Unlike other repertories that generalize symptoms, this work acts as a meticulously indexed guide to Constantine Hering's 10-volume "matured" Materia Medica. 1. Historical Foundation and Philosophy