“As to life on the moon, I find that I cannot be satisfied with a mere grass theory. I am so well convinced that there must be something more, that I no longer relegate my lunarians to an age antedating the volcanoes. On the contrary, as soon as I get my telescope I am going to look for signs of them and their doings in the present day, and willy nilly, sir, you have got to aid me in the search.” ------------------------------------------------------------------------ APPENDIX ------------------------------------------------------------------------ APPENDIX DATES, and age of the moon, when the twenty-one serial photographs were made at the Yerkes Observatory, by Mr. Wallace, with the 12-inch telescope and a special color filter constructed by him: No. 1, February 19, 1904; Moon’s Age 3.85 Days No. 2, September 24, 1903; Moon’s Age 3.87 Days No. 3, July 29, 1903; Moon’s Age 5.54 Days No. 4, November 24, 1903; Moon’s Age 5.74 Days No. 5, July 1, 1903; Moon’s Age 6.24 Days No. 6, November 26, 1903; Moon’s Age 7.75 Days No. 7, July 2, 1903; Moon’s Age 7.24 Days No. 8, August 31, 1903; Moon’s Age 9.22 Days No. 9, August 2, 1903; Moon’s Age 8.97 Days No. 10, November 30, 1903; Moon’s Age 11.78 Days No. 11, December 1, 1903; Moon’s Age 12.98 Days No. 12, September 4, 1903; Moon’s Age 13.27 Days No. 13, September 5, 1903; Moon’s Age 14.40 Days No. 14, August 26, 1904; Moon’s Age 15.65 Days No. 15, August 28, 1904; Moon’s Age 17.41 Days No. 16, August 29, 1904; Moon’s Age 18.62 Days No. 17, October 10, 1903; Moon’s Age 20.06 Days No. 18, September 29, 1904; Moon’s Age 20.50 Days No. 19, August 16, 1903; Moon’s Age 23.81 Days No. 20, August 17, 1903; Moon’s Age 24.84 Days No. 21, August 19, 1903; Moon’s Age 26.89 Days ------------------------------------------------------------------------ INDEX ------------------------------------------------------------------------ INDEX Abenezra, 205. Abulfeda, 200. Air on the moon, 230. Albategnius, 78. Aliacensis, 78, 205. Almamon, 205. Alps, 97. remarkable valley in, 225. Altai Mountains, 72, 200. chain of small craters near, 200. Animal life on the moon, 228. Apennines, 10, 96, 104, 137, 143, 222, 232. Apennines and Caucasus, strait between, 234. Apianus, 205. Archimedes, 143, 232. Aristarchus, 117, 153. astonishing brilliance of, 112. cause of brilliance of, 155. possible composition of, 113. Aristoteles, 76, 138. Atlas, 70. Atmosphere, lunar, 31. disappearance of, 228. what has become of it, 32.