How did Robert Boyle influence John Locke’s interest in science and medicine?

At the University of Oxford, John Locke found the traditional curriculum unstimulating and sought out advocates of the "new science," among whom Robert Boyle was the most significant influence.1

Boyle, a preeminent natural philosopher, was a central figure in the "Experimental Philosophy Club" that met at his Oxford lodgings, where he and Locke associated. Through this connection, Locke’s interest in science and medicine was deeply cultivated:2

• Collaborative Research: Locke attended classes in iatrochemistry—the application of chemistry to medicine—and began collaborating directly with Boyle on significant medical research concerning human blood.1
• Scientific Methodology: Boyle’s emphasis on observation and experimental methods, as well as his advocacy for applying chemical principles to the study of the natural world and medicine, helped shape Locke’s own intellectual development.12

Following these experiences, medicine became a central focus of Locke’s life, and his later philosophical work remained closely aligned with the empirical, scientific approach championed by Boyle and other members of the Royal Society.13