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. Phillips', Rev. Theo. E. R., drawing, 62. Pickering, W. H., canals seen by, 63; shows importance of steady atmosphere, 87; observations in Jamaica by, 88; polariscope observations by, 36-38; theory of, 105. Planetology, 77. Plurality of worlds, astronomer's belief in, 18; Edward Hitchcock's views of the, 21; Flammarion's views of the, 19; Newcomb's attitude in regard to the, 28; Newcomb's belief in the, 29; O. M. Mitchell's views in regard to the, 19; Sir David Brewster's views of the, 17; Sir Richard Owen's views in regard to the, 19; Tyndall's views of the, 22. Polar snow cap, proof deduced from Lowell, Douglass, and Pickering, 135. Profound changes by man, 123. Railroads in Iowa and Texas, 142. Review of Lowell's book, 66. Rift in Southern Africa, 112. Schiaparelli, abstemiousness when observing, 84; brief sketch of, 172; canals artificial, 62; _canali_ natural, 60; discovery, 57; discovery of canals, 39; does not deny intelligence in Mars, 60; suggestion as to doubling, 120. Sea, so-called, land areas, 39. Seasonal changes, 136. Snow storms in Mars, W. H. Pickering, 138. Solar system a standard for universe, 26.