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4297. An essay on contagions & infections: and their laws of generation & communication, by which they are respectively governed, and thence properly to be distinguished : designed, as the continuation of the remarks, in an "Essay, on the prevailing fever of 1817" : together with a syllabus, and classification, with practical remarks on the origin of contagions and infections : to which, are added, hints and directions, to the best means for preventing the extension of contagious & infectious diseases

4298. Observations on the changes of the air, and the concomitant epidemical diseases in the island of Barbadoes: to which is added, A treatise on the putrid bilious fever, commonly called the yellow fever, and such other diseases as are indigenous or endemial in the West India islands, or in the torrid zone

4299. Memoria sobre la sangria