Aberdeen Mechanics' Institute - Courses of lectures

Professional lecturers were keen to deliver talks on scientific and philosophical subjects. Astronomy was a popular topic and many lectures about "Orrery" were organised as part of the Institute's programme. The word "Orrery" comes from the name of Charles Boyle, fourth Earl of Orrery (1676-1731) and means "a mechanical model, usually clockwork, devised to represent the motions of the earth and moon (and sometimes also the planets) around the sun" (Oxford English dictionary).