Johannes Werner was the first to propose the lunar distance method of calculating this quantity.
The most famous person to have worked on determining this quantity had earlier invented the grasshopper escapement and the gridiron pendulum, both important for advancing the measurement of this quantity. Johannes Werner was the first to propose the lunar distance method of calculating this quantity. Several acts of Parliament named for this quantity in the 18th century encouraged the development of a means of calculating this quantity with (*) rewards now equal to over Â£1 million today. Dead reckoning was the primary means of determining this quantity until the invention of the marine chronometer by John Harrison, which allowed one's position on the globe to be accurately calculated. For 10 points, this is what quantity describing one's east-west position relative to the Prime Meridian?
The most famous person to have worked on determining this quantity had earlier invented the grasshopper escapement and the gridiron pendulum, both important for advancing the measurement of this quantity.
longitude (accept time before "lunar distance" and prompt after)