The Encyclopedia of Pure Materia Medica

Timothy Field Allen, MD (1837–1902) was an American homeopath, dean of the New York Homeopathic Medical College, and the general editor of the most ambitious documentary project in homeopathy's history.

T.F. Allen is not to be confused with his contemporary H.C. Allen. Where H.C. Allen compiled keynotes for daily clinical use, T.F. Allen compiled the primary source material — every proving, every symptom, attributed and indexed.

The Encyclopedia of Pure Materia Medica was published in twelve volumes between 1874 and 1879. It is the definitive source compilation of homeopathic provings up to its date — every symptom is referenced back to its original prover and publication.

This is not a book to prescribe from directly. It is the archive that every modern materia medica and every modern repertory ultimately traces back to. When a symptom is disputed, or when you want to see the original proving data for a remedy, T.F. Allen is where you go.

For serious students of materia medica and for anyone researching remedy provings, it is indispensable. For daily prescribing, start with Boericke or Kent and consult T.F. Allen when you need the primary source.