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Start Over Subjects Pennsylvania -- epidemiology ✖Remove constraint Subjects: Pennsylvania -- epidemiology Titles Proofs of the origin of the yellow fever, in Philadelphia & Kensington: in the year 1797, from the domestic exhalation ; and from the foul air of the snow Navigation, from Marseilles : and from that of the ship Huldah, from Hamburgh, in two letters, addressed to the governor of the Commonwealth of Pennsylvania ✖Remove constraint Titles: Proofs of the origin of the yellow fever, in Philadelphia & Kensington: in the year 1797, from the domestic exhalation ; and from the foul air of the snow Navigation, from Marseilles : and from that of the ship Huldah, from Hamburgh, in two letters, addressed to the governor of the Commonwealth of Pennsylvania Dates by Range 1750-1799 ✖Remove constraint Dates by Range: 1750-1799

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