Pritchard, parallax of β Aurigæ, [388];
photographic determinations of stellar parallax, [417]
photometric catalogue, [420]
Pritchett, corona of January, 1889 [186];
red spot on Jupiter, [294]
Proctor, glare theory of corona, [182];
speed of ejections from sun, [205]
transit of Venus, [233]
distance of sun, [236]
atmosphere of Venus, [254]
rotation of Mars, [275]
map and canals of Mars, [278] [279]
condition of great planets, [289]
Nova Andromedæ, [403]
status of nebulæ, [422] [423]
structure of Milky Way, [424]
star drift, [426]
Procyon, satellite,[ 42]; parallax, [417]
Prominences, observed in 1842 [ 63],[ 64],[ 68];
described by Vassenius,[ 68]
observed in 1851 [ 70]
photographed during eclipse, [167] [188] [190]
without eclipse, [197] [198]
spectrum, [168] [178] [194] [195] [198] [199]
spectroscopic method of observing, [168]-170 [194]-196
white, [183] [184]
chemistry, [195] [199]
classification, [196]
distribution, [199]
movements in, [204]-206
heat of development, [220]
Quetelet, periodicity of August meteors, [329]
Ranyard, drawing of sun-spot, [101];
coronal types, [175] [185]
lunar atmosphere, [265]
Jupiter's markings, [297]
meteors from fixed radiants, [341]
cometary trains, [348]
tenuity of nebulæ, [409]
Rayet, spectrum of prominences, [168] [170]
Red spot on Jupiter, [293] [296]
Reduction of observations,[ 31];
Bessel's improvements,[ 32], [122]
Baily's,[ 60]