Harrison, John (16931776)

Harrison, John, a celebrated mechanician, born at Foulby, Yorkshire; was the first to invent a chronometer which, by its ingenious apparatus for compensating the disturbing effects caused by variations of climate, enabled mariners to determine longitude to within a distance of 18 m.; by this invention he won a prize of £20,000 offered by Government; amongst other things he invented the compensating gridiron pendulum, still in use (16931776).

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Harrison, Frederic * Harrison, William
Harold I. of Norway
Haroun-al-Raschid
Harpies
Harrington, James
Harris, Howel
Harris, Joel Chandler
Harris, Luke
Harrisburg
Harrison, Benjamin
Harrison, Frederic
Harrison, John
Harrison, William
Harrogate
Harrow
Harry, Blind
Hart, Solomon Alexander
Harte, Bret
Hartford
Hartlepool
Hartley, David
Hartmann