Birt, rotation of a sun-spot, [144];
Selenographical Society, [266]
Bischoffsheim, Coudé telescope, [436]
Black Ligament, [235]
Bode, popular writings, [5];
solar constitution,[ 57]
missing planet,[ 72],[ 73]
Boeddicker, heat-phases during lunar eclipses, [269] [270];
drawings of Jupiter, [296]
of the Milky Way, [424]
Boehm, solar observations, [146] [148]
Boguslawski, centre of sidereal revolutions,[ 41];
observation of Halley's comet, [102]
Bolometer, principle of construction, [222]
Bond, G. P., his father's successor,[ 86];
light of Jupiter, [289]
Saturn's rings, [298]
Donati's comet, [324] [325]
Andromeda nebula, [409]
double-star photography, [409]