inner comets (Encke, Biela, Faye) -- p. 107 and note. Revolving aerolites
(meteoric stones, fire-balls, falling stars). Their planetary velocity,
magnitude, form, observed height. Periodic return in streams; the November
stream and the stream of St. Lawrence. Chemical composition of meteoric
asteroids -- p. 130 and notes. Ring of zodiacal light. Limitation of the
present solar atmosphere -- p. 141 and note. Translatory motion of the
whole solar system -- p. 145-149 and note. The existence of the law of
gravitation beyond our solar system. The milky way of stars and its
conjectured breaking up. Milky way of nebulous spots, at right angles with
that of the stars. Periods of revolutions of bi-colored double stars.
Canopy of stars; openings in the stellar stratum. Events in the universe;
the apparition of new stars. Propagation of light, the aspect of the starry
vault of the heavens conveys to the mind an idea of inequality of time -- p.
149-154 and notes.

II. Terrestrial Portion of the Cosmos . . . . . . . . . . . . . . Page
154-359

a. Figure of the earth. Density, quantity of heat, electro-magnetic
tension, and terrestrial light -- p. 154-202 and note. Knowledge of the
compression and curvature of the earth's surface acquired by measurements of
degrees, pendulum oscillations, and certain inequalities in the moon's
orbit. Mean density of the earth. The earth's crust, and the depth to
which we are able to penetrate -- p. 159, 160, note. Threefold movement of
the heat of the earth; its thermic condition. Law of the increase of heat
with the increase of depth -- p. 160, 161 and note. Magnetism electricity
in motion. Periodical variation of terrestrial magnetism. Disturbance of
the regular course of the magnetic needle. Magnetic storms; extension of
their action. Manifestations of magnetic force on the earth's surface
presented under three classes of phenomena, namely, lines of equal force