O the obliquity of the ecliptic
O the occultation of δ Piscium, in February 1821, and phenomena attending occulatation
O the occultation of δ Piscium, in February 1821, and phenomena attending occultation
O the orbits of binary stars
O the Orientation of Graves in Prehistoric Cemetaries
O the Origin of Novae
O the parallax of Îą LyrĂŚ
O the parallax of Sun
O the Period Changes of U Cephei
O the period of the variable star β Lyrγ
O the perturbations of Biela's comet
O the pivots of astronomical instruments
O the pivots of astronomical instruments
O the planetary theory
O the position of the ecliptic
O the position of the ecliptic
O the Potential of a Rotating Bar of Regular Galaxies
O the present apppearance of γ Virginis and σ Lupi (Feb. 1836)
O the Problem of Double Resonance
O the Profiles and the Polarization of Raman Scattered O VI Lines in Symbiotic Stars