ACADEMY OF SCMSCES.] ASTRONOMY. 37 



85. On observations of contacts of the limb of Venus or Mercury with that of the sun. 



Mo. Notices R. Asir. Soc, vol. 37 (March 9, 1877): 237-241. 

 Dated Washington, 1877, February 22. 



86. Note on the new inequalities in the moon's longitude, pointed out by Mr. Neison. 



Mo. Notices R. Astr. Soc, vol. 37 (June 8, 1S77): 428-430. 



87. Details about the moons of Mars. 



New York Tribune (Aug. 23, 1877). 



Letter dated Washington, Aug. 22, 1877. Extract from this letter in Nature, London, vol. 16 (Sept. 6, 1877): 398. 



88. [Elements of the Mars satellites.] 



Astr. Nach., vol. 90 (Sept. 15, 1877): cols. 275-276. 

 In a letter from John Rodgers. 



89. The discovery of the satellites of Mars. 



Nature, London, vol. 16 (Sept. 27, 1877): 450-457; cf. also pp. 398 (no. 91 of this section). 



90. [Note on le Verrier.] 



• Nation, New York, vol. 25 (Sept. 27, 1877): 198. 

 Anonymous. 



91. The satellites of Mars. 



The Observatory, London, vol. 1 (Oct. 20, 1877): 213-214. 

 Letter dated Washington, Aug. 22, 1877. 



92. On the mean motion of the moon. 



Amer. Jl. Sci., 3 s. vol. 14 (Nov., 1877): 401-410. 



Also a summary in The English Mechanic, London, vol. 26 (Jan. 4, 1878'!: 400. 



93. New elements of Iphegenia (107), etc., communicated by Simon Newcomb. 



Astr. Nach., vol. 91 (Nov. 28, 1877): cols. 107-10S. 



94. Astronomy by R. S. Ball ... specially revised for America by S. Newcomb. 



New York, H. Holt & Company, 1878, 134- 154 pp. 

 Of the series: Handbooks for students and general readers. 



95. Corrections to Hansen's tables of the moon, prepared and printed for the use of the Amer- 



ican Ephemeris and Nautical Almanac. 



Washington, Govt, print, off., 1878. [3] pp. 

 Signed: Simon Newcomb. 



96. Reduction of the constants of precession found by Bessel, Struve, and Nyren, to a common 



equinox. 

 Vierteljahrsschrifl Astr. Gesell., vol. 13 (1878): 107-110. 



97. Instructions for observing the transit of Mercury, May 5-6, 1878. 



Washington, 1878. 8 pp. diagrs., plates. 

 Also in Wash. Obs., 1876, app. 2 (1878). 



98. Popular astromony. 



New York, Harper Bros., 1878. 16+566 pp. 4- 5 maps of stars. 



Second ed., 1879, 184-572 pp. 4- maps of stars. Third ed., 1880. Fourth ed. revised, 1882, 184-577 



pp. (Reprinted, 1883.) Fifth ed., 18S6, 18+578 pp. Sixth ed., 1890. Seventh ed., New York, 



American Book Co. [1893]. 18+57Spp. (preface dated Mar., 1892). Eighth ed., 1S96, 18+578 pp. 



Small editions were manufactured in 1909, 1910, 1911, 1912, and 1918. 

 Beginning with 1880 a "School Edition " was issued in America; since 1882 there has been no other "school" 



edition. The work is still in demand; between January 1, 1908, and December 31, 1921, 1125 copies 



were sold. 

 London, MacMillan, 1878, 566 pp. Exactly same as Harper's first edition with the exception of the title 



page. Second ed., 1883, 580 pp. (preface dated July, 1882). Second ed. revised [July], 1910, 600 pp. 

 Of the English edition 3,500 copies have been sold. 



98A. German translation — Populiire Astronomie, von Sim. Newcomb, Astronom in Wash- 

 ington. Deutsche vermehrte Ausgabe, bearbeitet durch Rud. Engelmann. 



Leipzig, Verlag von Wilhelm Engelmann, 18S1, 16+742 pp. 



Zweite vermehrte Auflage, herausgegeben von Dr. H. C. Vogel, 1892, 20+748 pp. Dritte Aullage 

 [thoroughly revised], 1905, 10+748 pp. Vierte Auflage in Gemeinschaft mit den Herren Eberhard, 

 Ludendorff, Schwarzschild, herausgegeben von P. Kempf, 1911, 16+722 pp. Fiinfte Auflage, 1914, 

 12+835 pp. Sechste Auflage, in Gemeinschaft mit den Herren Eberhard, Freundlich, Kohlschutter, 

 herausgegeben von H. Ludendorff, 1921, 12+889 pp. Siebente Auflage, 1922, 14+902 pp. 

 An English translation of the seventh edition is in course of preparation. 



