ASTRONOMY. 209 



ASTRONOMICAL and Meteorological Observations made at the United 

 States Naval Observatory. 



APPENDIX 3. Newcomb, Simeon. Positions of Fundamental 

 Stars deduced from Observations made at the U. S. Naval 

 Observatory, between the years 1862 and 1867. 



4to. 38 pp. Washington, 1868. 



OBSERVATIONS FOR 1868. 



APPENDIX 1. Gilliss, J. M. A Catalogue of 1,963 Stars 

 Reduced to the Beginning of the Year 1850,. together with 

 a Catalogue of 290 Double Stars. 



4to. 73 pp. Washington, 1870. 



OBSERVATIONS FOR 1869. 



APPENDIX 2. Coffin, Prof., and Lieuts. Page and Steedman. 

 Zones of Stars observed at the U. S. Naval Observatory, in 

 the years 1846, 1847, 1848 and 1849. 



4to. 331pp. Washington, 1872. 



OBSERVATIONS FOR 1870. 



APPENDIX 1. Harkness, W. R. Report on the Difference 

 of Longitude between Washington and St. Louis. 



4to. 39 pp. Washington, 1872. 



APPENDIX 2. Hall, A., and Harkness, W. R. Reports on 



Observations of Encke's Comet during its Return in 1871. 



4to. 49 pp. Washington, 1872. 



APPENDIX 3. Newcomb, Simeon. On the Right Ascensions 

 of the Equatorial Fundamental Stars and the Corrections 

 Necessary to Reduce the Right Ascensions of Different 

 Catalogues to a Mean Homogeneous System. 



4to. 73 pp. Washington, 1872. 



OBSERVATIONS FOR 1871. 



APPENDIX 2. Yarnal, Prof. Results of Observations made 

 at the U. S. Naval Observatory with the Transit Instru- 

 ment and Mural Circle, in the years 1853 to 1860, inclusive. 

 8vo. 144pp. Washington, 1872. 



OBSERVATIONS FOR 1872. 4to. Washington, '1872. 



APPENDIX 1. Eastman, John R. Tables of Instrumental 

 Constants and Corrections for the Reduction of Transit 

 Observations. 45 pp. 



APPENDIX 2. Report on the Difference of Longitude be- 

 tween Washington and Detroit, Mich. ; Carlin, Nevada, 

 and Austin, Nevada. 



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