8

Flaugergues, detection of 1811 comet, 99;
transit of Mercury, 244

Fleming, Mrs., spectrum of Beta Lyrae, 379;
preparation of Draper Catalogue, 386;
discoveries of new stars, 399

Flint, star-parallaxes, 417

Fontana, mountains of Venus, 252;
satellite, 256;
spots on Mars, 274

Forbes, George, trans-Neptunian planets, 306, 307

Forbes, James D., spectrum of annularly eclipsed sun, 134;
solar constant, 225

Foucault, spectrum of voltaic arc, 137;
photograph of the sun, 153;
velocity of light, 232, 240;
silvered glass reflectors, 429

Fraunhofer, early accident, 33;
improvement of refractors, 34;
clockwork motion, 121;
spectra of flames, 131;
of sun and stars, 133, 134, 372;
objective prism, 385;
diffraction gratings, 439

Fraunhofer lines, mapped, 133, 136;
origin, 135-137, 171, 172;
reflected in coronal spectrum, 170, 173, 181;
in cometary spectra, 354, 357;
shifted by radial motion, 201

Freycinet, distribution of minor planets, 287

Fritz, auroral periodicity, 162

Frost, solar heat radiation, 222

Galileo, descriptive astronomy, 2;
double-star method of parallaxes, 16;
discovery of sun-spots, 52;
solar rotation, 146;
planets and sun-spots, 163;
darkening at sun's edge, 221

Galle, discovery of Neptune, 81, 82;
Saturn's dusky ring, 86;
distance of the sun, 237;
path of Andromede meteors, 334

Galloway, solar translation, 39

Gambart, discovery of comet, 95

Gauss, orbits of minor planets, 74;
_Theoria Motus_, 77;
magnetic observations, 126, 127;
cometary orbits, 370

Gautier, sun-spot and magnetic periods, 126, 128;
sun-spots and weather, 129

German Astronomical Society, 6, 414

Gill, star-parallaxes, 37, 42, 416, 417;
expedition to Ascension, 237;
distance of the sun, 237, 238, 240;
constant of aberration, 241;
arc measurements, 261, 262;
comet of 1882, 359, 412;
oxygen-absorption in stars, 384;
photograph of Argo nebula, 404;
Cape Durchmusterung, 412;
photographic celestial survey, 413;
actinic intensity of galactic stars, 425;
Coude telescope, 438

Gladstone, J. H., spectrum analysis, 134, 136

Glaisher, occultation by Halley's comet, 106

Glasenapp, coronal photographs, 185;
light equation, 231, 241;
double star measures, 419

Glass,