As it is now no longer a matter of doubt that the diseases of mankind consist merely of groups of certain symptoms, and may be annihilated and transformed into health by medicinal substances, but only by such as are capable of artificially producing similar morbid symptoms (and such is the process in all genuine cures), hence the operation of curing is comprised in the three following points:
I. How is the physician to ascertain what is necessary to be known in order to cure the disease?
II. How is he to gain a knowledge of the instruments adapted for the cure of the natural disease, the pathogenetic powers of the medicines?
III. What is the most suitable method of employing these artificial morbific agents (medicines) for the cure of natural disease?