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by Inoculation, by Nature, or the common Way of Infection, must have been of the safe and gentle Sort, being constituted wholly of mild and safe Materials; and therefore, that it is a mild Sort is not owing to Inoculation, for it could not have been otherwise; let it then be supposed, that a Separation being made by the inoculated Matter, only the mild and kindly Particles were called forth and beckned, I know not how, to come away; which starting from those of a malignant Quality, and uniting together, conspired to form the Small-Pox, and determined to admit none of the dangerous and putred Particles into their Company: Let this be granted, tho' it might puzzle a considerable Philosopher to account for such an Effect, and tell the World how this can be done, that is, how the Inoculated Matter of a mild and gentle Nature should be endowed with so much Sagacity and Choice, as to stir up and assemble only friendly and gentle Particles like its own, having first disengaged them from their Union with others of a noxious Nature; I demand what is become of those malignant Parts, which would have made a terrible Disease, had they not been disengaged and divided from the others of a mild Disposition? The Answer must be, that they are left behind in the Blood; for it cannot be pretended, that they were any Way conquered, digested and expelled thence by this Operation; and if they are left behind in the

Blood,