At sea, longitude comes down to time: 15 degrees is one hour. In 1761 John Harrison’s H4 watch reached Jamaica five seconds slow, about two miles of longitude.
Lodestone – drawn stories about ideas and inventions.
Sources:
Who was John Harrison? – Royal Museums Greenwich:
John Harrison – Linda Hall Library:
Longitude Act – Wikipedia:
Longitude – Wikipedia:
We state only what the sources support. How much Harrison was paid in total is described differently by sources and is not claimed here.
Music: “Dreams Become Real” Kevin MacLeod (incompetech.com), Licensed under Creative Commons: By Attribution 4.0 License,
Sound effects: Sonniss GameAudioGDC bundles (royalty-free licence) and Kenney sound packs (CC0).
#history #navigation #science
source