34 BIBLIOGRAPHY OF ASTRONOMY: 1887. 



Leipzig observatory. 



Bruns (H.) [Report for 1886.] Vrtljschr. d. astron. Ge.sellscli., 22: 123. 

 Leipzig observatory (Engelmann's). 



Engelmann (R.) [Report for 1886.] Ibid., 124. 

 Lenses. See Glass (Optical); Photography (Astronomical); Spherometer. 

 Lick observatory. 



Appel (D.) Der grosse Refraktor der Lick-Sternwarte. Sirius, 20 : 54. 

 [Description of instruments, progress of work, etc.] Eng. mec, 44: 149, 474, 

 519; 46: 321. Also: Nation, 44: 233; 45: 506. Also: Obsry., 10: 110, 

 168. Also: Sc. Am., 57 : 330. Also: Sid. mess., 6 : 86, 87, 157, 295. Also: 

 Sirius, 20 . 285. 

 Keeler(J. E.) Time service of the Lick observatory. 16 p. 8vo. [Northfield, 

 1887.] 



Repr.frnm: Sid. mess., 6 : 233-248. 

 Proctor (R. A.) The great Lick telescope. Know!., 10 : 205, 209. 

 Publications of the Lick observatory of the university of California ... by E. 



S. Holden. Vol. 1, 1887. 3 + 312 p. il. 4to. Sacramento, 1887. 

 Todd (D. P.) [Lecture on] the Lick observatory. Sc. Am., 56 : 73. 

 Liege observatory (Ougree). 



PR Ball (L.) [Report for 1886.] Vrtljschr. d. astron. Gesellsch., 22 : 125. 

 Light. See, also, Earth ; Sky-glows ; Spectrum analysis. 



Bell (L.) Absolute wave-length of light. Am. j. sc, 133 : 167-182. 

 MiCHELsoK (A, A.) Velocity of light in air and refracting media. Sc. Am. 



sup. 9331. 

 MiCHELsoN (A. A.) & MoRLEY (E. W.) Relative motion of the earth and the 



luminiferous aether. Am. j. sc, 134 : 333-345. 

 Method of making the wave-length of sodium light the actual and prac- 

 tical standard of length. IbuL, 427-430. 

 Liverpool observatory. 



[Report for 1886.] Month, not., 47 : 15-5. 

 Louvain observatory (Terby's). 



Pauwels (C.) L'observatoire particulier de M. F. Terby a Louvain. Ciel et 

 terre, 8 : 13-16. 

 Lunar theory. 



Airt(G. B.) Numerical lunar theory. 10-f-178p. 4to. London, 1886. (I5s.) 

 iZeu. by R[adau] (R.) Bull, astron., 4 : 275-286. ^i.so; Obsry., 10 : 339, 377. See, also, 

 Obsry., 10 : 175. 



Colbert (E.) Motion of the lunar apsides. Sid. mess., 6 : 49, 82. 



Glaisher (J. W. L.) Address ... on presenting the gold medal of the [royal 

 astronomical] society to G. W. Hill, Month, not., 47 : 203, 220. 



Hall (A.) Ncrte on Mr. Stockwell's "Analytical determination of the inequali- 

 ties in the motion of the moon arising from the oblateness of the earth." 

 Astron. jour., 7 : 41. 



Nkison (E.) On G. W. Hill's paper on Delaunay's method. Month, not., 47: 

 51". 



