New Zealand's lost colossus: all-mechanical racetrack oddsmaking computer

In 1913, George Julius installed a building-sized, all mechanical odds-calculating computer at Auckland, NZ's Ellerslie racetrack, powered by huge iron weights that slowly pulled down bike chains over sprockets, driving the clockwork device as it "totalised" all the bets laid on horses at the track, keeping the odds in constant balance so that all the bettors were effectively betting against one another, in a system called "pari-mutuel" betting. (more…)