Donati's comet, 324, 347

Wisniewski, last glimpse of 1811 comet, 99

Witt, discovery of Eros, 284

Wolf, C., objections to Faye's cosmogony, 315;
origin of Phobos, 321

Wolf, Max, photographic discoveries of minor planets, 283, 284;
Nova Andromedae, 394;
Nova Aurigae, 396;
nebula near Nova Persei, 401;
photographic nebular survey, 412;
galactic nebulosity, 425

Wolf, R., sun-spot and magnetic periodicity, 128, 162, 163;
analogy of variable stars, 128, 392;
aurorae, 129;
suspicious transits, 249

Wollaston, ratio of moonlight to sunlight, 49;
flame spectra, 131;
lines in solar spectrum, 133

Woods, coronal photography, 179, 180;
Cape Durchmusterung, 412

Wrangel, aurorae and meteors, 335

Wright, G. F., Ice Age in North America, 260

Wright, Thomas, theory of Milky Way, 14;
structure of Saturn's rings, 299

Wright, W. H., polarisation of cometary light, 355;
spectrum of nebulae, 400

Yerkes, donation of a telescope, 433

Young, Miss Anne, nebular hypothesis, 314

Young, C. A., spectrum of sun-spots, 156;
origin, 158;
spectrum of corona, 170, 177;
detection of reversing layer, 171, 172;
prominences and chromosphere, 194-196, 200;
photograph of a prominence, 197;
spectroscopic measurement of sun's rotation, 202;
solar cyclones and explosions, 204, 205;
basic lines, 207;
spectrum of Venus, 254;
red spot on Jupiter, 294;
observations of Uranus, 303, 304;
Andromedes of 1892, 337;
spectrum of Tebbutt's comet, 355;
of Nova Andromedae, 395

Young, Thomas, absorption spectra, 136

Zach, Baron von, promotion of astronomy, 5, 6, 28;
Baily's Beads, 62;
search for missing planet, 72;
rediscovery of Ceres, 74;
use of a heliostat, 120

Zantedeschi, lines in solar spectrum, 134;
lunar radiation, 269

Zenger, observations on Venus, 253, 255

Zenker, cometary tails, 348

Zezioli, observation of Andromedes, 334

Zodiacal light, relation to medium of space, 94;
to solar corona, 176;
meteoric constitution, 310

Zoellner, electrical theory of comets, 99, 344, 346, 347;
solar constitution, 158;
observations of prominences, 194, 196;
reversion spectroscope, 202;
solar temperature, 220;
Mercurian phases, 245;
albedo of Venus, 255;
of Jupiter, 290;
of Saturn, 303;
of Ura