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The first issue of Philosophical Transactions was published on 6 March 1665, under the visionary editorship of Henry Oldenburg. In 1886, the breadth and scope of scientific discovery had increased to such an extent that it became necessary to divide the journal into two: Philosophical Transactions A, covering the physical sciences; and Philosophical Transactions B, covering the life sciences.

This page contains content published in Philosophical Transactions A since January 1887. Click here for earlier content from Philosophical Transactions of the Royal Society (1665-1887).