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==Biology== * [[Marcello Malpighi]] publishes ''Dissertatio Epistolica de Bombyce'' in London, a study of ''[[Bombyx mori]]'' which is the first published [[monograph]] on an [[invertebrate]]. * [[Robert Morison]] publishes ''Praeludia Botanica'', emphasising use of the structure of a plant's fruits for its classification. * [[Francis Willughby]] and [[John Ray]] publish "Experiments concerning the motion of sap in trees, made this spring".<ref>''[[Philosophical Transactions of the Royal Society]]'' '''4''': pp. 963β965.</ref> * [[Jan Swammerdam]] publishes ''Historia Insectorum Generalis'' in the Netherlands, explaining the process of [[metamorphosis]] in [[insect]]s.
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