ASTRONOMY. 33 



16. Longitude of Washington as derived from moon calculations observed at the Royal Obser- 



vatory, Greenwich, and the United States Observatory, Washington, during the 

 years, 1846-1860, inclusive. 

 Wash. Obs., Appendix A (1862): xliii-li. 



17. On Kowalski's theory of Neptune. 



Mo. Notices R. Astr. Soc, vol. 25 (1S65): 45^7. 



18. Investigation of the latitude and longitude of the United States Naval Observatory, 



Washington, and of the declinations of certain circumpolar stars. 

 Wash. Obs., 1864 (I860), pp. xxxix-xlvii. 



ISA. On the latitude and longitude of the United States Naval Observatory, Washington, 

 and the declinations of certain circumpolar stars. 

 [Washington, 1866?], 9 pp., and cover title. [Appendix to the introduction to Wash. Obs., 1864]. 



19. An investigation of the orbit of Neptune, with general tables of its motion. 



Washington, Smithsonian Institution, January, 1S66, 6+111 pp. 

 Also in Smithsonian Contribs. Kn.. vol. 15, art. 2 



Smithsonian Institution publication no. 199. 



20. Measures of the Companion of Sirius made at the United States Naval Observatory, 



Washington, 1866, with a note on the identity with the disturbing body indicated 

 by theory. 

 Astr. Nach., vol. 66 (May 4, 1866): cols. 381-384. 

 A small part of the communication is by C H. Davis. 



21. Schreiben des Herrn Prof. Simon Newcomb an den Herausgeber. 



Astr. Nach., vol. 67 (Sept. 6, 1866): cols. 347-348. 



Letter, dated Washington, July 24, 1S66, correcting a statement of Dr. Oppolzer's in regard to Leverrier's Solar Tables. 



22. Observations of the later asteroids made at the United States Naval Observatory, Wash- 



ington, with the great transit circle of Pistor & Martins. 

 Astr. Nach., vol. 67 (Sept. 12, 1866): cols. 363-367. 



23. Description of the transit circle of the United States Naval Observatory. 



Wash. Obs., 1865, app. 1 (1867): 47 pp.+S pis. 



23A. Description of the transit circle of the United States Naval Observatory, with an inves- 

 tigation of its constants. 



Washington, Govt, print, off., 1867. 34-50 pp., 8 folding pis. 



24. An investigation of the distance of the sun and of the elements which depend upon it. 



Washington Obs., 1865, app. 2 (1867): 29 pp. 



24A. An investigation of the distance of the sun and of the elements which depend upon it, 

 from the observations of Mars made during the opposition of 1862, and from other 

 sources. 



Washington, Govt, print, off., 1867. 29 pp. 



25. The United States Naval Observatory. 



N. Amer. Rev., vol. 105 (Oct., 1867): 3S2-393. 

 Anonymous. 



26. Sur la parallaxe du soleil. 



Complex Rendus, vol. 65 (Nov. 25, 1867). 



Letter dated United States Observatory, Washington, Oct. 31, 1887, to M. Delaunay. 



27. Observations and discussions on the meteoric showers of November, 1867, U. S. Naval 



Observatory, Washington. [Reports by S. Newcomb, W. Harkness, and J. R. E. 

 Eastman.] 

 Washington, Govt, print, off., 1867, 40 pp., 3 maps. 



S. Newcomb's report, pp. 5-12; map A by S. Newcomb and W. Harkness. 



28. Meteoric showers. 



N. Amer. Rev., vol. 107 (July, 1868): 38-50. 



This is in the form of a combined review of ( 1 ) Observations and Discussions on the meteoric showers of November Meteors of 1867 by 

 the United States Naval Observatory [no. 27]; (2) Meteoric Astronomy by D. Kirkwood; and (3) A Treatise on Meteorology 

 by E. Loomis. 



