N.

_Natural Day_, not compleated in the time that the Earth turns round

it’s Axis, 222.

_New_ and _Full Moon_, to calculate the times of 355.

_New Stars_, 403,

cannot be Comets, 404.

_New Style_, it’s original, 414.

NICIAS’s Eclipse, 328.

_Nodes_, of the Planet’s Orbits, their places in the Ecliptic, 20.

Of the Moon’s Orbit, 317.

their retrograde motion, 319.

_Nonagesimal Degree_, what, 259.

_Number of Direction_, 426.

Astronomy Explained Upon Sir Isaac Newton's Principles And made easy to those who have not studied mathematics · 第 263 / 275 题