Part 16

Ledger's, Rev. E., canals of Mars, 131.

Liberal attitude of naturalists, 185.

Life at high altitudes, 150; in other worlds, Garrett P. Serviss, 148; under atmospheric pressure, 153.

Lindsay's, Thomas, expressions, 55.

Lines of artificial character, 112.

Lockyer, Sir Norman, saw clouds in Mars, 136.

Lockyer's, W. J., testimony, 89.

Lowell, Percival, brief sketch of, 174; different telescopes used by, 82; gives reason why canals cannot always be seen, 93; his acute eyesight, 85, 86; his book on Mars, 31; his various publications, 31; long practice in observing, 85; snow caps prove atmosphere, 135; on life on Mars, 32, 67; on twilight atmosphere in Mars, 34.

Lung capacity, 155; at high altitudes, 152.

Macpherson, Hector, Jr., agrees with Lowell, 68.

Mars, appearance of Earth from, 118; beginning of life in, 16; canals, 40; canals continuous, 109; dark regions change with the season, 38; dark regions not seas, 37; desert lands, 39; detached fields of snow, 37; disappearance of southern snow cap, 37; distance from sun, 12; double canals, 45, 46; drawings of, coincided, 81; glints of brilliant light, 37; has it water? 35; has life appeared in? 15; life in, from analogy, 15; much like the world, 16; nearest approach to earth, 32; oases, 44; seasonal changes in, 34; seasons, 33; rarefaction of atmosphere in, 35; rotation of, Cassini, 33; temperature of, 35; terminator of, Douglass, 35; those who see and those who do not see, 85; tilt of axis, 33; white polar caps, 33.

Maunder, director of committee, 126.

Maunders's, E. W., comments, 103.

Maunier, Stanislaus, on canal doubling, 119.

Maxwell, Clerk, on mathematicians, 74.

Mediæval attitude of some astronomers, 181.

Michel, Louise, teaching children, 73.

Morehouse, George W., believes Mars is inhabited, 67, 68.

My own work, 158.

Newcomb's, Professor, opinion, 24; other worlds inhabited, 28; "Reminiscences," 27.

Number of acres under irrigation, 122.

Observations of Mars, 1st period, 51; 2d period, 52; 3d period, 53; 4th period, Lowell's work, 54.

Orr's, J., theory, 102.

Parallel case of interpretation, 181.

Patterson's, John A., expressions, 56.

Perrotin, brief sketch of, 177.

Perrotin and Janssen describes the canals, 63; and Thollon, 58.

Perrotin's painstaking care, 63, 64.