Note 241 — ON THE THEORY AND ART OF PRESCRIBING.

The practitioner must receive the term similar, conventionally, as expressed at page 71. Many of those substances which we are at present bound to consider similar, will no doubt, require to be transplanted into other classes as the progress of physiological knowledge shall elucidate their modes of action. In this attempt to teach the Art of Medicinal Combination, I have endeavoured to reduce the propositions it comprehends to the greatest degree of generality of which they are, at present, susceptible.