The Sources - Synthesis

Synthesis encompasses additions from the Repertories that are primarily used today: Boericke's Repertory, Phatak's Repertory, etc.

Information from different Materia Medica has been integrated, especially from classical authors such as:

Hahnemann - surprisingly, many of Hahnemann's symptoms seem not to have been integrated into Kent's Repertory.
Kent's Materia Medica - fully integrated on the basis of Dr. Linda Johnston's tremendous work. (USA)
Hering's Guiding Symptoms - this source was preferred over copying from the secondary source, Knerr's Repertory, which contains the same material.
Allen's Encyclopedia - the original book, not the index (which contains many mistakes and omissions).
Roberts' "Sensations as if" - Although some consider it to be a Repertory, it is a full text structured line by line. It has taken much time to transcribe it into a correct repertory structure. The entire book has been integrated into Kent's Repertory.
Many other Materia Medicas were integrated. Worth mentioning are: Clarke's Dictionary, William Boericke's Materia Medica, Phatak's Materia Medica, Borland's books, Tyler's Drug Pictures, the works of Dunham, Farrington, Lippe, etc.

Synthesis includes the additions from Henry Allen's Nosodes, reviews of Carcinosinum, Psorinum, different strains of Tuberculinum and Medorrhinum. An important number of clinical observations from various "living" authorities were added. Overall, Synthesis contains the most complete representation of nosodes to be found.

George Vithoulkas has gathered a great number of homeopaths in a Clinical Center in Athens, and estimates having reviewed more than 150,000 cases. From this extensive pool of clinical experience, Vithoulkas has personally collected more than 1,600 controlled additions for the 'Mind' chapter, and these are integrated into Synthesis.

On Vithoulkas' instructions, additions to other chapters have been added in successive versions of Synthesis. We have also included his indications on changes of degree (most often to a higher degree).

Future additions to Synthesis, as well as those that have come before, are the result of the collaborative efforts of thousands of homeopaths worldwide. It is only this intense combined focus and attention that allows the creation of such a precise and accurate homeopathic database.

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