Janssen, photographs of the sun, [165];
spectroscopic observations of prominences, [168] [169]
escape from Paris in a balloon, [171]
coronal spectrum, [173] [181]
coronal photographs, [181]
rarefaction of chromospheric gases, [182]
oxygen absorption in solar spectrum, [214]
transit of 1874 [234]
spectrum of Venus, [254]
of Saturn, [303]
photographs of Tebbutt's comet, [353] [354]
of Orion nebula, [407]
Japetus, eclipse of, [300];
variability in light, [302]
Jewell, solar spectroscopy, [200] [211]
Joule, heat and motion, [309]
Jupiter, mass corrected,[ 77],[ 92];
conjectured influence on sun-spot development, [163]
physical condition, [289] [290]
spectrum, [290] [291]
satellite-transits, [291] [292]
discovery of inner satellite, [293]
red spot, [293]-296
photographs, [297] [408]
periodicity of markings, [297]
Kaiser, rotation of Mars, [275];
map of Mars, [278]
Kammermann, observation of Maia nebula, [410]
Kant, status of nebulæ,[ 14];
Sirius the central sun,[ 40]
planetary intervals,[ 71]
tidal friction, [272]
condition of Jupiter, [289]
cosmogony, [308]
Kapteyn, solar translation,[ 40];
Cape Durchmusterung, [412]
stellar parallaxes, [417] [418]
actinic intensity of galactic stars, [425]
solar cluster, [426]