2d series, v. 12, 2 pts. and appendix, ix+592 p. il. 14 pl. map, 4°
Notes:
* For Sale by Superintendent of Documents. Cloth, $1.75.
Notes:
CONTENTS.—Pt. 1, Equatorial observations, 1908-26.—Pt. 2, Photographic equatorial observations, 1912-24. and Photoheliographic observations, 1917-27.—Appendix, World longitude operation of 1926, results of observations at San Diego and Washington; by F. B. Littell, J. C. Hammond, C. B. Watts, and P. Sollenberger.
Availability:
* For Sale by Superintendent of Documents. Cloth, $1.75.