* For Sale by Superintendent of Documents. Paper, 15c.
Notes:
NOTE.—In the volumes of the American ephemeris and nautical almanac and the American nautical almanac, beginning with those for 1925, the hours of the day lire counted from midnight to midnight instead of from noon to noon as was done in the volumes before 1925, and the time is designated civil time instead of mean time. By this change each day begins 12 hours earlier than formerly.
Availability:
* For Sale by Superintendent of Documents. Paper, 15c.