02-07-2021, 12:24 PM
Sorry Parazine I left school in 1960 and what metric measurements I can recall was taught it was based on divisions of the distance from N pole to equator. See below.
The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the Earth's circumference is approximately 40000 km.
John Mason
The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the Earth's circumference is approximately 40000 km.
John Mason
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.