"Naval Observatory (Washington, DC)" . . "Astronomy Observations Periodicals." . . "USA. Senate." . . . . . . . . . . "Washington astronomical and meteorological observations made during the year ... at the United States Naval Observatory" . . . . . . . . . . . "Miscellaneous documents / Astronomical and meteorological observations made during the year ... at the United States Naval Observatory" . . . . . "Astronomical and meteorological observations, made during the year ... at the United States Naval Observatory" . "Observations" . "Observations"@en . . "Periodicals" . "Periodicals"@en . . "Astronomical and meteorological observations made during the year ... at the United States Naval Observatory" . "Astronomical and meteorological observations made during the year ... at the United States Naval Observatory"@en . "Astronomical and meteorological observations made during the year ... at the United States Naval Observatory (Online)"@en . . "Astronomical and meteorological observations made at the United States Naval Observatory"@en . . . . . "Miscellaneous documents / Astronomical and meteorological observations made at the United States Naval Observatory during the year" . . "Washington observations" . "Astronomical and meteorological observations made at the United States Naval Observatory during the year" . . . . . "Meteorology Observations Periodicals." . . "Geomagnetism." . . . . "Meteorology." . . "Geomagnetism Observations Periodicals." . . "Astronomy." . . "United States Naval Observatory.." . . "Naval Observatory (Washington, D.C.)" . .