rchrdm@earthlink.net said: > “Longitude: The True Story of a Lone Genius Who Solved the Greatest > Scientific Problem of His Time,” by Dava Sobel (Author). There is also a coffee table version with lots of good pictures. -- These are my opinions. I hate spam.

Wasn't Christian Huygens the first to devise a clock for the purpose of determining longitude? Or was it Edmund Halley...but he didn't rely on clocks. I think On Tuesday, July 5, 2016, Hal Murray <hmurray@megapathdsl.net> wrote: > > rchrdm@earthlink.net <javascript:;> said: > > “Longitude: The True Story of a Lone Genius Who Solved the Greatest > > Scientific Problem of His Time,” by Dava Sobel (Author). > > There is also a coffee table version with lots of good pictures. > > > -- > These are my opinions. I hate spam. > > > > -- I am Pulse. Unbreakable.