20 EDWAKD EMERSON BARNARD— FROST [Memoirs [vol t xxi; 



The great photographic nebula of Orion, encircling the belt and Theta nebula. Astronomy and Astrophysics, 



vol. 13, 1894, p. 811, reprinted in Popular Astronomy, vol. 2, 1894, p. 151. 

 On the probable motion of the annular nebula of Lyra (M 57) and the peculiarities in the focus for the planetary 



nebula? and their nuclei. Astronomische Nachrichten, vol. 140, 1896, p. 283. Monthly Notices, vol. 60, 



1900, pp. 245-257; vol. 66, 1906, pp. 104-113. 

 On the Owl nebula, Messier 97 = N. G. C. 3587. Monthly Notices, vol. 67, 1907, pp. 543-550, 577. 

 The variability of the nucleus of the planetary nebula N. G. C. 7662. Monthly Notices, vol. 68, 1908, pp. 



465-480. 

 Measures of small stars in the Dumb-bell nebula (N. G. C. 6853). Monthly Notices, vol. 62, 1902, pp. 466- 



468; vol. 76, 1915, pp. 90-95. Astronomy and Astrophysics, vol. 13, 1894, p. 445. 

 Observations of planetary nebulae. Astronomische Nachrichten, vol. 151, 1900, pp. 355-356; vol. 172, 1906, 



p. 123. Astronomical Journal, vol. 30, 1917, p. 208. 



CELESTIAL PHOTOGRAPHY 



General papers. Monthly Notices, vol. 50, 1890, pp. 310-314; vol. 57, 1896, pp. 10-16. Sidereal Messenger, 

 vol. 6, 1887, p. 58; vol. 10, 1891, p. 331. Astrophysical Journal, vol. 2, 1895, pp. 351-353; vol. 8, 1S98, 

 p. 240; vol. 21, 1905, pp. 35-48. Proceedings of the American Philosophical Society, vol. 46, 1907, pp. 

 417-429, reprinted in Popular Astronomy, vol. 16, 1908, pp. 286-298. The Photographic Times, vol. 27, 

 1895, p. 65. 



A simple and rapid method on detecting changes on celestial photographs due to motion or variability of the 

 celestial bodies. Astronomische Nachrichten, vol. 130, 1892, p. 77. 



On an instrument for accurately photographing an unseen, moving, but known celestial body. Astronomische 

 Nachrichten, vol. 144, 1897, pp. 331-332. 



The development of photography in astronomy. Proceedings of the American Association for the Advance- 

 ment of Science, vol. 47, 189S, pp. 19-51, reprinted in Popular Astronomy, vol. 6, 1898, pp. 425-455. 



MILKY WAY 



Photographic studies of the Milky Way. Monthly Notices, vol. 56, 1895, p. 63; vol. 59, 1S99, pp. 354-370. 

 Knowledge, vol. 13, 1890, pp. 174-175,* 186; vol. 14, 1891, pp. 50,* 93, 232*; vol. 15, 1892, pp. 14, 16; 

 vol. 16, 1893, pp. 10-12*; vol. 17, 1894, pp. 16, 17, 61-62*; vol. 19, 1896, p. 205. Astronomy and Astro- 

 physics, vol. 13, 1894, pp. 177, 791. Astrophysical Journal, vol. 1, 1895, p. 10; vol. 2, 1895, p. 58; vol. 

 5, 1897, p. 1; vol. 9, 1899, pp. 157-158; vol. 17, 1903, pp. 77-80; vol. 23, 1906, pp. 144-147; vol. 41, 1915, 

 pp. 253-258. The Journal of the Royal Astronomical Society of Canada, vol. 16, 1C22, pp. 51-53. 



On a great photographic nebula in Scorpio near Antares. Astronomische Nachrichten, vol. 138, 1895, p. 211- 

 214. Monthly Notices, vol. 55, 1895, p. 453. Popular Astronomy, vol. 5, 1897, pp. 227-232. 



On the comparative distances of certain globular clusters and the star clouds of the Milky Way. Astronomical 

 Journal, vol. 33, 1920, p. 86. 



On a nebulous groundwork in the constellation Taurus. Astrophysical Journal, vol. 25, 1907, pp. 218-225. 

 Reprinted in Bulletin de la Socie'te' Beige d'Astronomie, vol. 13, 1908, pp. 129-136. 



On a great nebulous region and on the question of absorbing matter in space, etc. Astrophysical Journal, vol. 

 31, 1910, pp. 8-14. 



Observations of dark regions in the sky. Astronomische Nachrichten, vol. 108, 1884, p. 369. Sidereal Messenger 

 vol. 2, 1883, p. 259. Astrophysical Journal, vol. 38, 1913, pp. 496-501; vol. 43, 1916, pp. 1-8. Popular 

 Astronomy, vol. 14, 1906, pp. 579-583; vol. 23, 1915, p. 596; vol. 26, 1918, p. 685. Proceedings of the 

 National Academy of Sciences, vol. 1, 1915, pp. 394-396. Publications of the American Astronomical 

 Society, vol. 3, 1915, p. 116. 



On the dark markings of the sky, with a catalogue of 182 such objects. Astrophysical Journal, vol. 49, 1919, 

 pp. 1-23, 360. 



THE SUN 



Observations of solar eclipses. Reports on the observations of eclipses, published by the Lick Observatory, 

 1889 and 1891. Astronomical Journal, vol. 18, 1897, p. 23. Popular Astronomy, vol. 9, 1901, pp. 527-544. 

 Publications of the United States Naval Observatory, 2d series, vol. 4, Appendix 1, pp. D211-D216. 



THE MOON 



Observations of the moon. Astronomische Nachrichten, vol. 130, 1S92, p. 7. Monthly Notices, vol. 55, 1895, 

 p. 456. Sidereal Messenger, vol. 9, 1890, p. 282. Astronomical Journal, vol. 10, 1890, p. 31; vol. 22, 1901, 

 p. 33. Astrophysical Journal, vol. 2, 1895, pp. 347-349. Nature, vol. 66, 1902, pp. 5-6. 



Periodical changes in the size of the glow surrounding the lunar crater Linne\ Astronomische Nachrichten, vol. 

 170, 1906, pp. 293-296. 



Lunar eclipses. Astronomische Nachrichten, vol. 161, 1903, pp. 81-84. Sidereal Messenger, vol. 8, 1889, p. 

 137. Popular Astronomy, vol. 3, 1895, p. 102; vol. 21, 1913, pp. 277-278. 



* Text by A. O. Ranyard. 



