“The first impression of the uninitiated who first takes in hand our voluminous works on materia medica, is to perceive no difference between the recorded provings of the many medicines. He thinks on glancing over the material medical pages that every medicine has caused some giddiness, some headache, some fever, some cough; all and every one of them. He remains unavoidably puzzled on the subject until he begins to compare the records more closely and accurately; he then sees clearly the differences that exist between the various medicines and the manner in which they are similar and differ.”
Source: Lippe, A., Key to the materia medica, or, Comparative pharmacodynamic. 1854
