Earth's circumference mile in the seventeenth century and the metre in the eighteenth. Earth's polar circumference is almost exactly 40,000 km because the metre was originally calibrated on this measurement (1/10-millionth of the distance between the poles and the equator), which is almost exactly 21,600 nautical miles (being defined as one minute of a degree – i.e. 360 multiplied by 60). It has been described as "the single most important measurement" of the Earth, assuming the Earth to be a sphere (the Earth is an technically an ellipsoid, albeit with just 0.3% flattening). Earth's circumference lines are the foundation of the coordinate
Minuscule 852 (Gregory-Aland) Minuscule 852 (Gregory-Aland) Minuscule 852 (in the Gregory-Aland numbering), ε406 (von Soden), is a 14th-century Greek minuscule manuscript of the New Testament on parchment. The manuscript has not survived in complete condition. The codex contains the text of the four Gospels on 165 parchment leaves (size ). The text is written in one column per page, 28 lines per page, with some lacunae in Matthew 28:18-20; Mark 1:1-21; Luke 1:1-22; John 1:1-27. The text is divided according to chapters (), whose numbers are given at the margin, and their titles () at the top of the pages. There is also