Reports on observations of Encke's comet during its return in 1871.
By: By Asaph Hall and Wm. Harkness ... Prepared at the U.S. Naval Observatory by order of Rear-Admiral B.F. Sands, U.S.N., superintendent.
Contributors: Harkness, William, 1837-1903.; United States Naval Observatory.
Publisher: Govt. Print. Off.
Published: 1872
Place of publication: Washington
Language: eng
Number of pages: 49
Subjects: Encke's comet
Notes: At head of title: Washington observations for 1870--Appendix II.
Issued also in U.S. Naval Observatory. Washington observations for 1870, published in 1873.