M.

_Magellanic Clouds_, 402.

_Man_, of a middle size, how much pressed by the weight of the

Atmosphere, 175;

why this pressure is not felt, _ib._

_Mars_, it’s Diameter, Period, Distance, and other Phenomena, 64-67.

_Matter_, it’s properties, 99.

_Mean Anomaly_, what, 239.

_Mercury_, it’s Diameter, Period, Distance, &c. 22.

Appears in all the shapes of the Moon, 23.

When it will be seen on the Sun, 24.

The inclination of it’s Orbit and Place of it’s Ascending Node, _ib._

It’s Path delineated, 138.

Experiment to shew it’s Phases and apparent Motion, 142.

_Mercury_ (Quicksilver) in the Barometer, why not affected by the

Moon’s raising Tides in the Air, 311.

_Meridian_, first, 207.

Line, how to draw one, 226.

_Milky Way_, what, 400.

_Months_, _Jewish_, _Arabian_, _Egyptian_, and _Grecian_, 415.

_Moon_, her Diameter and Period, 52.

Her phases, 53, 255.

Shines not by her own light, 54.

Has no difference of seasons, 55.

The Earth is a Moon to her, 56.

Has no Atmosphere of any visible Density, 58;

nor Seas, 59.

How her inhabitants may be supposed to measure their year, 62.

Her light compared with day-light, 85.

The excentricity of her Orbit, 98.

Is nearer the Earth now than she was formerly, 163.

Appears bigger in the Horizon than at any considerable height above

it, and why, 187;

yet is seen much under the same Angle in both cases, 188.

Her surface mountainous, 252:

if smooth she could give us no light, _ib._

Why no hills appear round her edge, 253.

Has no Twilight, 254.

Appears not always quite round when full, 256.

Her phases agreeably represented by a globular Stone viewed in

Sun-shine when she is above the Horizon, and the observer placed

as if he saw her on the top of the Stone, 258.

Turns round her Axis, 262.

The length of her Solar and Sidereal Day, _ib._

Her periodical and synodical revolution represented by the motions of

the hour and minute hands of a Watch, 264.

Her Path delineated, and shewn to be always concave to the Sun,

265-268.

Her motion alternately retarded and accelerated, 267.

Her gravity toward the Sun greater than toward the Earth at her

Conjunction, and why she does not then abandon the Earth on that

account, 268.

Rises nearer the time of Sun-set when about the full in harvest for a

whole week than when she is about the full at any other time of

the year, and why, 273-284:

this rising goes through a course of increasing and

decreasing benefit to the farmers every 19 years, 292.

Continues above the Horizon of the Poles for fourteen of our natural

Days together, 293.

Proved to be globular, 314.

and to be less than the Earth, 315.

Her Nodes, 317.

ascending and descending, 318.

their retrograde motion, 319.

Her acceleration proved from antient Eclipses, 322, _n._

Her Apogee and Perigee, 336.

Not invisible when she is totally eclipsed, and why, 346.

How to calculate her Conjunctions, Oppositions, and Eclipses,

355-390.

How to find her age in any Lunation by the Golden Number, 423.

_Morning_ and _Evening Star_, what, 145.

_Motion_, naturally rectilineal, 100.

Apparent, of the Planets as seen by a spectator at rest on the

outside of all their Orbits, 133;

and of the Heavens as seen from any Planet, 154.

Astronomy Explained Upon Sir Isaac Newton's Principles And made easy to those who have not studied mathematics · 第 262 / 275 题