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To the Honourable


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HE Observations which I happened to make (for I designed them not) upon the Bills of Mortality, have faln out to be both Political and Natural, some concerning Trade and Government, others concerning the Air, || Countries, Seasons, Fruitfulness, Health, Diseases, Longevity, and the proportions between the Sex and Ages ''of Mankind. All which (because Sir Francis Bacon reckons his Discourses of Life and Death to be Natural History ; and because I understand your selves are also appointing means, how to measure the Degrees of Heat, Wetness, and Windiness in the several Parts of His Majesties Dominions) I am humbly bold to think Natural History also,''