The following treatise contains all that Schussler wrote on the subject. The symptoms have been compiled from the entire available literature and enriched with the author's personal experience. Since its first edition in 1888 and thereafter, its steadily increasing demand has exhausted four large editions and necessitated the preparation of a fifth edition. The concept of Bio-chemic salts is to provide the salts that are lacking in the body. This approach tends to fulfill that deficiency in the body.