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4635. Letter from Doctor Edward Jenner, to William Dillwyn, Esq., on the effects of vaccination, in preserving from the small-pox: to which are added sundry documents relating to vaccination, referred to and accompanying the letter

4637. The influence of civic life, sedentary habits, and intellectual refinement, on human health, and human happiness: including an estimate of the balance of enjoyment and suffering in the different gradations of society