-------------------------------------------------------

------
|           |               | Gravity  |           |          |
|           |     Axial     |    at    |           | Orbital  |
|           |    Revolu-    | Surface. |  Periodic | Velocity |
|   Name.   |     tion      | [Earth]  |    Time.  | in Miles |
|           |               |   = 1    |           | per sec. |
|-----------|---------------|----------|-----------|--------

--|
| Sun       | 25 to 26d     |  27.71   |           |          |
| Mercury   | 24h 5m(?)     |   0.46   |   87.97d  |  29.55   |
| Venus     | 23h 21m(?)    |   0.82   |  224.70d  |  21.61   |
| Earth     | 23h 56m 4s    |   1.     |  365.26d  |  18.38   |
| Mars      | 24h 37m 22.7s |   0.39   |  686.98d  |  14.99   |
| Asteroids |               |          |           |          |
| Jupiter   |  9h 55m 20s   |   2.64   |  11.86yrs |   8.06   |
| Saturn    |    10h 14m    |   1.18   |  29.46yrs |   5.95   |
| Uranus    |    Unknown.   |   0.90   |  84.02yrs |   4.20   |
| Neptune   |    Unknown.   |   0.89   | 164.78yrs |   3.36   |
------------------------------------------------------------

-

[Page 275]
              EXPLANATION OF ASTRONOMICAL SYMBOLS.

SIGNS OF THE ZODIAC

0. [Symbol] Aries     0 deg.  |   VI. [Symbol] Libra        180 deg. 
I. [Symbol] Taurus   30   |  VII. [Symbol] Scorpio      210
II. [Symbol] Gemini   60   | VIII. [Symbol] Sagittarius  240
III. [Symbol] Cancer   90   |   IX. [Symbol] Capricornus  270
IV. [Symbol] Leo     120   |    X. [Symbol] Aquarius     300
V. [Symbol] Virgo   150   |   XI. [Symbol] Pisces       330

* * * * *

[Symbol]  Conjunction.      |          S.  Seconds of Time.
[Symbol]  Quadrature.       |            deg.   Degrees.
[Symbol]  Opposition.       |           ’  Minutes of Arc.
[Symbol]  Ascending Node.   |           "  Seconds of Arc.
[Symbol]  Descending Node.  |       R. A.  Right Ascension. 
H.  Hours.            | Decl. or D.  Declination. 
M.  Minutes of Time.  |    N. P. D.  Dist.  From North Pole.

OTHER ABBREVIATIONS USED IN THE ALMANAC.

S., South, i.e., crosses the meridian; M., morning; A, Afternoon; Gr.  H. L. N., greatest heliocentric latitude north, i.e., greatest distance north of the ecliptic, as seen from the sun. [Symbols] Inf., inferior conjunction; Sup., superior conjunction.

GREEK ALPHABET USED INDICATING THE STARS.

a, alpha. | ae, eta. | n, nu. | t, tau. b, beta. | th, theta. | x, xi. | u, upsilon. g, gamma. | i, iota. | o, omicron. | ph, phi. d, delta. | k, kappa. | p, pi. | ch, chi. e, epsilon. | l, lambda. | r, rho. | ps, psi. z, zeta. | m, mu. | s, sigma. | o, omega.

[Page 276] CHAUTAUQUA OUTLINE FOR STUDENTS.

As an aid to comprehension, every student should draw illustrative figures of the various circles, planes, and situations described.  (For example, see Fig. 45, page 112.) As an aid to memory, the portion of this outline referring to each chapter should be examined at the close of the reading, and this mere sketch filled up to a perfect picture from recollection.