He was familiar with attraction and repulsion of bodies due to static electric charge, which he attributed to "most subtle spirit": https://link.springer.com/ch

He was familiar with attraction and repulsion of bodies due to static electric charge, which he attributed to "most subtle spirit": https://link.springer.com/chapter/10.1007/978-94-009-7715-0_6 https://link.springer.com/chapter/10.1007/978-94-009-7715-0_...