Having now explained the nature and difference of these two last stages, which are properly the small-pox, I shall proceed to the treatment; and begin by the rules to be observed during the first, viz. from the appearance of the fever to the eruption. These rules are the more important as the two periods always correspond. It is universally allowed, that the higher the fever is, the fuller the eruption will be. When that once appears, it must have its course; the business of art is therefore to check it beforehand, by endeavouring to mitigate the disorder in the first stage, whence depends the degree of it in the second.
Our rules are simple, easy, and equally applicable to the natural and artificial small-pox.