:220 OBSERVATIONS AND REPORTS. 
Washington ( continued) . 
Z7. S. Naval Observatory. Astronomical Observations. Vol. 1-6. 
1845-52. 4P, Washington, 1846-67. 
Appendices. Vol. 3 (1847.) A. Observations on Solar Spots, by B. Sestini. 
B. Observations on the Mississippi river by R. A. Marr. 
C. Tables for the Eeductions of the Places of the Fixed 
Stars. 
Astronomical and Meteorological Observations. Vol. 8-22. 
1861-75. 40. Washington, 1862-78. 
Appendices. Vol. 9 (1862). Longitude of Washington. 
10(1863). A. Solar Parallax from Observations of the Planet Mars, 
B. Orbit of Nemausa. 
11 (1864). Latitude and Longitude of the Observatory. 
12 (1865). I. Description of the Transit Circle of the Observatory. 
II. Investigation of the Distance of the Sun. 
13 (1866). Discussion of the Meteorological Observations, 1842-67. 
14 (1867). I. Diiference of Longitude between Washington and 
Havana. 
II. Observations of the Total Eclipse of the Sun, 
August 7, 1869. 
III. Positions of Fundamental Stars, from Washington 
Observations, 1 862-67. 
IV. Catalogue of 151 Stars in Praesepe. 
15 (1868). Catalogue of Stars observed by the U. S, Astronomical 
Expedition to the Southern Hemisphere, 1850-52. 
16 (1869). I. Eeports on Total Solar Eclipse in Europe of Dee. 
22, 1870. 
II. Zones of Stars observed with the Mural Circle, 
1846- 49. 
17 (1870). I. Keport on the Difference of Longitude between 
Washington and St. Louis. 
II. Reports on Observations of Encke's Comet during 
its Return in 1871. 
III. Right Ascensions of the Equatorial Fundamental 
Stars. 
IV. Zones of Stars observed with the Meridian Transit 
Instrument, 1846-49. 
18 (1871). I. Zones of Stars observed with the Meridian Circle. 
1847- 49. 
II. [Vol. 7 ,of Volumes of Observations.] Results of 
Observations made with the Transit Instrument 
and Mural Circle, 1853-60. 
18 (1871). III. Catalogue of Stars observed during the years 
1845-71. 
IV. Memoir of the Founding and Progress of the U. S, 
Naval Observatory. 
19 (1872). I. Tables for the Reduction of Transit Observations. 
II. Difference of Longitude between Washington and 
Detroit, Mich. ; Carlin, Nevada ; and Austin, 
Nevada. 
20 (1873). The Uranian and Neptunian Systems investigated with 
the 26-inch Equatorial. 
