Developed over decades in the 1700s, Harrison’s clocks were major steps toward a reliable way of calculating longitude at sea Developed over decades in the 1700s, Harrison’s clocks were major steps ...

THERE is a practical answer to the problem put by Mr. Latimer Clark (NATURE, vol. xviii. p. 40). As a matter of fact the day begins, or rather the day is first named at the 180° meridian east or west ...

The Prime Meridian of the World (dotted line) and the modern reference meridian indicating zero longitude using satellite measurements (solid line). Once called the Prime Meridian of the World, the ...

Once called the Prime Meridian of the World, the invisible line running north to south that divides the world into Eastern and Western hemispheres passed through the Airy Transit Circle — a ...