@jws Part of the enlightenment was making our own set of Napier’s Bones on strips of paper. I think I could still wield a slide rule.
/@hazardwarning
@jws All mention of slide rules gives me a huge blast of nostalgia as I remember the day Mr Bateman the maths teacher finally switched on the lightbulb in my head labelled "logarithms".
// @hazardwarning
@hazardwarning I wonder whether those diagonal lines represent some kind of Vernier scale.
@joanna I’m inclined to think George may not be the name they were first given.