Jupiter, 103-108.
not solid, 104, 107.
a semi-sun, 105, 108, 152, 166, 167.
white spots of, 106.
Jupiter, "great red spot" of, 164.
time of rotation, 164.
a vast uprush of heated vapor, 165, 166.
Jupiter's belts,
secular progression, 104.
rotate at different speeds, 104, 162, 163.
color, 104.
wisps across, 105, 106.
bright ones, cloud, 163, 167.
spectrographic study of, 166.
K
Kapteyn, 14.
Keeler, 19, 52, 110.
Kepler, 6.
Kinetic theory of gases, 226, 228.
corollary of, 54.
extension of, 230, 231.
Kirkwood, Professor, 35.
L
Lagrange, 94, 97.
Lalande, 123, 124.
Lane, Homer, 234.
Langley, 191, 194.
Laplace, 34, 110, 127, 129, 131, 132, 138, 139, 147, 152, 175.
Laplacian cosmos, 129, 130.
false congruities of, 131-133.
annular genesis, disproved, 138, 139.
original "fire mist" of, impossible, 138.
Lapparent, de, 173-176, 183, 189.
Lemonnier, 115, 119.
Leonard, Miss, 79.
Leverrier, 119, 121-126.
Lexell, 115.
Libration in longitude,
of Mercury, 65, 69, 70, 222, 223.
causes true day, 70, 71.
of Venus, inappreciable, 83, 223.
of Moon, 224.
Lick Observatory, 13, 14.
Lockyer, 48.
Lowell Observatory, 65, 74.
M
Major planets,
gaseous, 117.
constitution of, differs from Sun or Earth, 161.
types of early planetary stages, 162.
self-centred and self-sustained, 168.
Man, immanent, 159.
Mars,
polar caps, 198.
canals in dark regions, 206, 207.
dying of exhaustion, 234.
Mass,
of Mercury, 63, 64, 68.
of Mars, 91.
of Jupiter, 103.
arrangement of, in solar system, 135-137, 148.
Massachusetts Institute of Technology, 134, 184.
Mauvais, 125.
Maxwell, Clerk, 110, 113, 228.
Mayer, 119, 151.
Mendeleeff, 161.
Mercury, 62-73.
time of rotation and revolution the same, 65, 69.
axis stands plumb to orbit, 70.
turns same face to the Sun, 70, 72, 134, 221.
surface markings, 72, 221.
color, 72.
Meteorites, 31, 35, 36.
cosmic bodies, 32, 33.
relation to shooting stars, 36.
members of solar system, 36.
composition, 40-44, 55.
fused by friction with atmosphere, 40.
temperature, 41, 55.
fragments of a dark body, 44.
link past to present, 44, 56, 57, 130.
Meteors,
orbits of, 36, 39, Notes 241-243.
visibility of, 38.
Meteor-streams, 33, 61.
first recognition of, 34.
disintegrated comets, 34.
Michelson, 10.
Milham, Professor, 99.
Mira Ceti, 235.
Mohler, 10.
Molecular speeds, gaseous, 228-231.
critical velocity, 230, 231.
