A quest for perfection : the life of John Gottlieb Ulrich : chronometer maker /Dee Helmore

"John Gottlieb Ulrich (1798-1875) watchmaker and ardent inventor of improvements to chronometers. An obsession which led to a life of poverty and debt. Were his inventions as revolutionary as he imagined? Was the lack of reward and recognition for his work totally justified? This is the record of the life of this colourful, eccentric and controversial enthusiast."--Provided by the publisher.