Edmund Halley, an astronomer and polymath aged 35, already famed for quite a few achievements in astronomy and meteorology, presents two inventions at the Royal Society : (1) a diving bell ; (2) a damped compass. Diving Bell Halley's Diving Bell & Diving Suit Halley has been thinking about a diving bell meant to working underwater for a while. Two years ago, he produced a paper describing a bell moving on its four wheels on sea bottom, fitted with an air intake so as to main
