Oberon, 243;
Distance and Period of, 392.
Objects, Distant, Apparent Smallness of, 25.
Observing Robes, 172.
Occultation of Star by Moon, 126.
Octagon Chapel, Bath, Organist of, 231.
Old Moon in New Moon’s Arms, 77.
Orbit of Leonids, 302.
Orbits of Giant Planets, 213.
” ” Uranus and Neptune, 250.
Orion, 387.
Oxygen Necessary to Life, 124.