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Rh : and are therefore called Hereditary; a sad Inheritance! And may not some of the Seeds of these grievous Distempers, intangled and complicated with those of the Small-Pox, be excluded to form and increase the Pustules, and be after conveyed with that Matter, which is taken from them, and so be inoculated together with the Small-Pox? And though none of these Diseases presently appear; may not their Seeds operate by Degrees and shew themselves, when they have acquired greater Vigour by assimulating and corrupting such Parts of the Blood and Humours, which they find there, that approach nearest to themselves in their Quality, and by such daily Accessions grow in Strength, and at Length break out in a formal Distemper; which, may likewise be said of several other Diseases, though not Hereditary? There is nothing unnatural or repugnant to Reason in this Supposition; whence it will follow, that the Operator intending to convey but one Disease, may transfuse several at the same Time into the Veins of a sound and healthful Patient, and thereby sow the Seeds of many dreadful Productions.

It may here properly be enquired, why our Inoculators have not extended their Operation to the Plague, since the Parity of Reason so much encourages it: There are many intermediate Degrees between the most malignant and the mildest, or least dangerous Kind of that terrible Disease. It is Rh