In 1891 British engineer Joseph Day patented the “crank-chamber scavenge two-stroke cycle gas engine”, and by 1892 his works in Bath were producing such engines with only three moving parts - in other words he invented the modern two stroke engine. However, the man himself is almost completely lost to history, and this well produced book looks at both him and his invention(s). 24 illustrated pages. Softcover. Bath Industrial Heritage Trust