INDEX.

Abbe, Professor, [56].
Actinism, [71].
Adams, Professor, [195].
Africa, [116].
Ages, stellar, [238].
Air:
dancing, [17];
a medium, [33];
continuous, [176];
rarefied, [179];
motes, [181];
nimble, [191].
(See [Atmosphere].)
Airless Mountains, [160].
Air-wave, [185].
Aitken’s Researches, [181].
Alaska, [38].
Aldebaran, [222], [235], [236], [246].
Algot, [228].
Allegheny Observatory, [17], [19], [84], [86].
(See [Langley].)
Alphonsus Ring-plain, [156].
Alps, [39], [148], [151], [167], [181].
(See [Apennines, Lunar].)
American Astronomers, [227].
American Continents, [20], [21], [31].
(See [South].)
Andalusia, [53].
Animalculæ, [224].
Animals:
food, [74];
fright, [42].
(See [Dog].)
Antares, [238].
Ants, [223].
(See [Insects].)
Apennines, [151], [153], [155], [160], [167].
(See [Alps, Lunar].)
Apples, [171].
Arab Traditions, [194].
(See [Moslem].)
Arago, quoted, [41], [42].
Archimedes, [94].
Archimedes Crater, [151–153], [155].
Arctic Cold, [159].
Arctic Pole, [96].
Arcturus, [208], [211].
Aristillus Crater, [151].
Aristotelian Philosophy, [8].
Arzachel, [156], [161].
Asteroids, [128].
Astrology, [127].
Astronomers and Priests, [1–3].
(See [American, New], [Old].)
Astronomical Day, [85], [86].
Atmosphere, [136], [180];
as a shield, [216], [220].
(See [Air].)
Atolls, [152].
Auger, simile, [31].
Aurora Borealis, [35], [67], [212].
Autolycus Crater, [151].
Axis, [9], [10].
Babel, [96].
Bain Telegraph, [88].
Balloons, [176].
Bees, [124].
(See [Insects].)
Berkeley’s Theory, [70].
Berlin Observatory, [233].
Bernières’s Lens, [103].
Bessemer Steel, [104–108].
Birds, [172], [196], [197].
(See [Animals].)
Black Hole, [73].
Bond, Professor, [204].
Boston, Mass., [88], [132].
Bothkamp, observations at, [66].
Breadstuffs, [78], [79].
(See [Grain], [Sun-spots], [Wheat].)
Bridges, [20], [68].
Britain, Ancient, [1], [234].
(See [England].)
British Isles, [14], [25].
Brocken Spectre, [55].
Brothers, Mr., [50].
Bubbles, [168].
Buffer, the air as a, [216], [220].
Bunsen’s Researches, [12].
Burnham, W. S., [233].
Burning-glasses, [102–104].
Burning Heat, [160], [163].
Cactus, [14], [24].
Calcutta, [73].
California, [151], [180].
Cambric Needle (q. v.), experiment, [132].
Cambridge Observations, [227], [245–247].
Camera Obscura, [63].
Campanus Crater, [163], [165].
Candle, simile, [39].
Cannon-ball, [5], [38], [41], [98], [135], [186], [211].
Canopus, [234].
Carbon, [72], [73], [107], [221].
Carbonic-acid Gas, [219].
Carpenter’s Studio, [140].
Carrington’s Work, [79], [87].
Carthage, [116].
Cassini, [42].
Cassiopeia, [229].
Cataclysm, [30].
Centimetres, [93].
Chacornac’s Drawing, [33].
Chambers, on sun-spots, [80].
Charleston Earthquake (q. v.), [42].
Chemical Elements, [221], [223].
Cherry-stone, comparison, [196].
Chicago:
great fire, [134];
astronomer, [233].
China:
lens, [103], [104];
soil, [180].
Chlorophyl, [73].
Chocolate, simile, [107].
Cholera, [80].
Chromosphere, [7];
clouds, [62];
forms, [64–68].
Cinders, [171].
Clark’s Glasses, [123].
Cliffs, [164].
Clock, [135].
Cloud-ocean, [179].
Clouds:
cirrous, [27], [28];
beautiful, [54];
and rain, [111];
formed, [249].
Coal-beds, [115].
Coal:
energy, [73–75], [111];
destroyed, [97];
wasted, [101];
stock, [112].
Cobweb, simile, [26].
Cold:
and eclipses, [40];
in planets, [136].
Colorado, [50].
Colors:
in eclipses (q. v.), [65];
mental, [70], [71];
in Jupiter (q. v.), [127];
in moon (q. v.), [168];
in stars (q. v.), [227];
spectrum (q. v.), [236].
Comet-hunters, [204], [207].
Comets:
chapter, [199–220];
Donati’s, [201], [204], [205], [207], [209], [217];
one part, [203];
parts and name, [208];
tail (q. v.), [208], [211];
diameter and parts, [216];
spectroscope, elements, dread, [219];
numerous, stone, [219], [220];
kernel, [220];
(1858), [213–216];
(1866), [200].
Common, A. A., [239], [247].
Compass, [86].
Connecticut Observations, [186], [242].
Converter, [104–108].
Coral, [151].
Corn, [111].
(See [Grain].)
Corona, [7], [36], [37], [40], [41], [43], [45–52], [55], [56], [59], [60–62].
Cotton-mill, [74].
Counting, [94].
Cracks, celestial, [163].
Craters, [164].
(See special names.)
Crystalline Structure, [4], [23–27].
Cyclones, [24], [31], [32], [68].
Decay, [248], [249].
Delambre’s History, [207].
De la Rue’s Engraving, [125].
Delfthaven, [5].
Denning’s Theory, [197].
Diamonds, melted, [103].
Dies Iræ, [249].
Dipper, [207], [208].
(See [Great Bear], Polar.)
Diurnal Oscillation, [87].
Dog, anecdote of, [42].
(See [Animals].)
Donati, [201], [204], [205], [207], [209], [213], [217].
(See [Comets].)
Double Stars, [233].
Draper, Professor Henry, [128], [246], [247].
Ducks, noise, [188].
Dust, [34], [100], [101], [102], [105], [197].
Dynamite, [182], [185], [220].
Earth:
relations, [3], [4];
description difficult, [6];
temperature (q. v.), [34], [101];
a string of earths, [96];
stars like, [118];
seen from outside, [133–135];
craters, [148].
Earthquakes, [220].
(See [Charleston].)
Earth-shine, [167], [172].
Eclipses:
total, [7], [37];
screen, [36];
three, [39], [55];
partial, [40];
singular gloom, [39–43];
causing fright, [43];
colors (q. v.), [48], [56], [61], [65], [66];
(1842), [41];
(1857), [48];
(1869), [39], [40];
(1870), [44], [61];
(1871), [50], [66], [68];
(1878), [38], [50], [57], [58].
(See [Total].)
Egypt, [116], [234].
(See [Pyramids].)
Electricity, [13], [75], [76].
Electric Light, [7].
Electric Spark, [242].
(See [Lightning].)
Electric Storm, [84], [85], [88].
Elizabeth, Queen, [115].
Engine-power, [98], [111].
England:
fleets, [2];
coal, [115].
(See [Britain], [London].)
Engraving, [17].
Enigma, [228].
Ephemera, [250], [251].
Equatorial Landscape, [13], [17], [18], [47].
Equatorial Telescope, [122].
Ericsson:
engravings, [112], [113];
discoveries, [163].
Eruptive Promontories, [66–68].
Etna, [164], [181].
Europe, size, [25].
Evolution, planetary, [139].
Explosive Forces, [182–194].
Eye, [71], [227].
Eye-pieces, [47], [63].
Fabricius’s Observations, [8].
Fact and Fancy, [175].
Factory, [73].
Faculæ, [32], [33].
Falling, [242], [243].
Falling Stars, [193].
(See [Meteors], [Shooting].)
Faraday, Michael, [76].
Fault, technical term, [156].
Faust, [139].
Faye:
theory, [29–32];
on Comets’ Tails, [212].
Fern-like Forms, [25], [26].
Filaments, [25–27], [30], [55], [56], [65], [66], [68].
Fire, in sun (q. v.), [92].
(See [Flames], [Heat].)
Fixed Stars, [233].
Flame-like Appearances, [23], [24].
Flames, [65], [66], [69], [185].
Flashes, [189], [195].
Flax, [111].
Flowers, color (q. v.), [70].
(See [Rose], [Plants].)
Foliage-forms, [32].
Fontenelle’s Story, [133].
Forbes’s Observations, [38], [39].
Frankenstein, [221].
Franklin’s Discoveries, [76].
Fraunhofer Studies, [235].
French Institute, [186].
Frost-crystals (q. v.), [23].
Furnaces, [101].
Galileo, [8], [121–123], [139], [140].
Gas:
glowing, [44];
in sun, [60].
Gas-jets, [40], [61], [68], [88].
Gassendi’s View, [172], [173].
Gelinck’s Observations, [80].
Geminids, [196].
Genii, [193].
Geographers and Geologists, [133].
Glare, [14], [18], [62–64].
Glass:
spun, [26];
globe, [145].
Glow-worms, [7], [117].
Good Hope Observations, [80].
Gould’s Researches, [80].
Grain, prices, [77], [80], [87].
(See [Corn], [Sun-spots], [Wheat].)
Gramarye, [92].
Grass-blades, [66], [72].
Grasses, [26].
Gravitation, [72], [203];
negative, [215].
Great Bear, [207].
(See [Dipper], [Polar].)
Green’s Maps, [130].
Greenwich Observatory, [2], [81], [82], [84], [85], [88], [89].
Gulliver’s Travels, [131], [132].
(See [Swift].)
Gunpowder, [186].
Guns, [135].
(See [Cannon-ball].)
Hall Island, [130].
Hall, Professor, [131].
Hand, illustration, [168].
Harkness’s Observations, [44].
Harvests, [90].
Hastings, Professor, [60].
Heat:
development, [13];
concentration, [19];
loss, [29];
confinement, [33];
sensation, [71];
vibrations, [72];
energy, [91];
amount, [92], [97];
computation, [94–96];
diminution, [101];
emission, [102];
storage, [111];
in sugar, [188].
(See Flames, [Sun].)
Hecla, [164], [181].
Hedgehog-spines, simile, [68].
Helmholtz’s Estimates, [98].
Hengist and Horsa, [1].
(See [Britain].)
Hercules, [238].
Herschel, Sir John:
sun-spots, [12–14];
electric storms, [88];
comet’s tail, [216].
Herschel, Sir William:
avoidance of light, [18];
prices, [79];
sun-spots (q. v.), [129].
Herschel’s Outlines, [11].
Holden, Professor, [124].
Honeycomb Structure, [30].
Huggins’s Experiment, [234], [235].
Humanity, deified, [172].
Human Race, [250].
Humboldt, [195].
Humming-bird, [70].
Hunt, Professor, [136], [219].
Hydrogen, [68], [99], [237].
Ibrahim, King, story, [194], [195].
Ice:
melted, [95], [96];
never melted, [163], [164].
Imbrian Sea, [151].
Insects, [224], [250].
(See [Ants], [Bees].)
Iron:
melting, [19], [107];
appearance of cold, [25];
in sun, [28];
in man, [221];
in stars, [236], [237].
(See [Steel].)
Ironstone, [188].
Ivy, [115].
Janssen’s Observations, [61].
Jevons, Professor, [80].
Joseph in Egypt, [90].
Jumping, [241], [242].
Jupiter, [79], [118], [124], [127–129], [156], [185], [229].
Kensington Museum, [221].
Kepler, on Comets, [219].
Kernels, [220].
Kew, [88].
Kirchoff’s Researches, [12].
Krakatao, [181], [185], [186].
La Harpe, quoted, [207].
Landscape, [169].
Langley, Prof. S. P.:
drawings, [15], [16], [18], [19], [21], [22], [25], [28], [30];
note-book, [24];
expedition, [180];
study of Reflection, [216].
(See [Allegheny], [Pittsburg].)
Latent Power, [220].
Laws of Nature, [250], [251].
Leaf-like Appearances, [23].
(See [Willow].)
Lenses, [102], [103];
Galileo’s, [123].
Leo, [195], [197].
Liais’s Drawing, [48], [50].
Lick Glass, [123].
Light:
development, [13];
day and night, [35];
white (q. v.), [48];
mental (see [Eye]), [71];
from balloon, [179];
transmitted, [227].
(See [Sun].)
Lightning, [75], [76], [242], [244], [245].
(See [Electric].)
Lily, [73].
(See [Flowers].)
Limited Express Train, [5].
Loaf-sugar, experiment, [188].
Lockyer’s Land, [130].
Lockyer’s Solar Physics, [59], [61], [236], [238].
Lombardy, [151].
London, [111].
Lost Pleiad (q. v.), [207].
Louis XV., [42].
Louis XVI., [221].
Lunar Alps (q. v.), [148], [149].
(See [Moon].)
Lunar Apennines (q. v.), [153].
Lunar Shadows, [36], [37], [39], [56].
Lyrids, [196], [200].
Macartney’s Lens, [103].
Maelstrom, [27].
Magic Lantern, simile, [220].
Magnesium, [236], [237].
Magnetic Needle, [81], [82], [84], [85], [87], [89].
Mammoth Cave, [40].
Man, chemistry of, [221], [233].
(See [Humanity].)
Manhattan Island, [111].
Mare Crisium, [143].
Mare Serenitatis, [143], [144].
Mars, [118], [128–132], [148].
Mason’s Publication, [137].
Matterhorn, [148], [167].
Mayflower, [5].
Meadows, [172].
Mecca, [175].
Medusa, [228].
Memnon, [234].
Mercator, [163], [165].
Mercury, [3], [118], [136], [229].
Messier, anecdote, [207].
Metals, melted, [103].
(See [Iron].)
Metaphysics, [70], [71].
Meteorites:
around Saturn, [124];
recent, [187];
lawsuit, [187], [188];
analyzed, [191], [192];
in Iowa, [199], [200];
swarm, [200];
cracking, [211].
Meteors, [98], [175–198];
(1868), [189].
(See [Falling], [Shooting].)
Meunier’s Investigations, [192].
Mexican Gulf, [38].
Microcosm, [222].
Micromegas, [223].
Microscope, [224].
Middle Ages, [91], [175].
Milky Way, [224], [225].
Milton, quoted, [14], [38].
Mind-causation, [70], [71].
Mirror, [102], [107].
Mississippi, [134].
Mites, [224].
Mizar, [207].
M’Leod’s Drawing, [44].
Monochromatic Light (q. v.), [63].
Montaigne of Limoges, [207].
Mont Blanc, [156].
Monte Rosa, [167].
Moon:
practical observations, [2];
newly studied, [3];
distance, [4–6];
size, [5], [6], [140], [156];
shadows (q. v.), [36], [125];
in sun-eclipse, [41];
planetary relations, [117–174];
and Jupiter, [127];
photograph, [137];
full, [141], [144], [147];
Man in the, [143];
mountains, [144];
craters, [147], [148];
temperature, [159];
airless, [160];
landscape (q. v.), [169];
age, [171];
broken up, [192];
like comet, [215].
(See [Lunar].)
Moslem Traditions, [175], [194].
(See [Arab].)
Moss, [160].
Mouchot’s Engravings, [109], [112].
Mountain Sickness, [50], [53].
Naples, [155], [157].
(See [Vesuvius].)
Napoleon, [80], [134].
Nasmyth’s Researches, [11], [12], [14], [24], [25], [140].
Nativity of Jesus, [229].
Nature’s Laws (q. v.), [176].
Nebulæ, [247].
Needle, [228].
(See [Cambric].)
Neptune, [121].
Nerves, none in camera, [47].
Nerve Transmission, [5], [6].
New Astronomy, [4], [75], [76], [117], [121], [171], [193], [222], [224], [227], [235], [246], [248].
(See [Old].)
Newcomb, Professor, [55].
Newspapers, printed by the sun, [74].
Newton, Professor, [191], [195–197].
Newton, Sir Isaac, [136], [203], [211];
on Comets, [215], [219].
Nightmare, [67].
Northern Crown, [208], [211], [230].
Novelists, theme for, [193], [228].
Nucleus, [11], [19], [216].
(See [Comets], [Corona].)
Oceans, [179].
Old Astronomy, [199], [203], [233].
(See [New].)
Organisms in sun (q. v.), [13].
Orion, [238], [239], [247].
Oxygen, [73].
Pacific Ocean, [180].
Palinurus, [243].
Parable, [224].
Paris:
Observatory, [42], [233], [247];
Exposition, [112].
Parker’s Lens, [103].
Peirce, Professor, [44].
Pennsylvania Coal, [97].
Penumbra, [11], [19], [20].
Perpignan, France, [42].
Perseus, [196].
Persian Rugs, [70].
Philadelphia, [88].
Philosopher’s Stone, [92].
Phœbus, [34].
Phosphorus, [221].
Photographic Plate, [71].
Photography, [9], [19], [128], [236], [237], [241], [244], [247], [248];
rapid, [242].
Photometer, [56], [108].
Photometry, [230].
Photosphere, [7], [17], [64].
Pickering, Professor, [132], [227], [228], [246].
Pico Summit, [148].
Piffard, Dr. H. G., [245].
Pike’s Peak, [50], [53–57], [60].
Pilgrim Fathers, [5].
Pine-boughs, [25].
Pine-trees, [60], [72].
Pittsburg Observations, [18], [19].
(See [Allegheny], [Langley].)
Planetoids, [196], [197], [229].
Planets:
condition, [97];
pulverized, [100];
and moon, [117–174];
isolated, [176].
(See [Jupiter], [Mars], [Mercury], [Saturn], [Sirius], [Stars].)
Plants, [72], [73].
(See [Flowers].)
Plato Crater, [147], [148], [151], [152].
Pleiades, [17], [231], [245].
(See [Lost].)
Plume, The, [19], [23], [24], [55].
Pointers, [208].
(See [Dipper].)
Poison, [222].
Polariscope, [49].
Polarization, [18].
Polarizing Eye-piece, [14], [18].
Polar Star, [230].
(See [Great Bear].)
Polyp, [152].
Pores, [24].
Pouillet’s Invention, [93].
Printing, indebtedness to the sun, [74].
Prism, [63], [64].
(See [Colors], [Scarlet].)
Proctor’s Observations, [14], [59], [69], [87].
Prospero’s Wand, [221].
Ptolemy, [155], [161].
Pyramids, [99], [117], [233], [234].
(See [Egypt].)
Pyrheliometer, [93].
Race, simile, [179].
Radiant Energy, [71], [74];
rate, [104].
Radiation, [101], [108].
Railway Explosion, [182], [183].
Railway, The, [156].
Rain, [111].
Rainbow, [70].
Ranyard’s Photographs, [50].
Red Sea, [116].
Reflection, [216].
Repulsive Force, [215].
Ribbons, [70], [236].
Rifts, [163], [164].
Rings, [123], [124], [152], [155].
(See [Saturn].)
Rockets, [67], [68].
Rocky Mountains, [88], [89], [180].
Roman Boy, [34].
Rope, [20], [26].
Rose-leaf, [63], [70].
(See [Leaves].)
Rowland’s Photographs, [237].
Ruskin, quoted, [29].
Russia, [134].
Rutherfurd Photographs, [8], [9], [137], [143], [155], [234].
Sal-ammoniac, [14], [25].
Salisbury Plain, [1], [2].
Sandstone, [192].
Saturn, [118], [119], [121], [123], [124], [127–129], [136], [215].
Saturnian Dwarfs, [223], [224].
Saul, comparison, [77].
Saxon Forefathers, [1], [2].
(See [Britain].)
Scarlet, [67].
(See [Colors].)
Schwabe, Hofrath, [76], [77], [87].
Scott, Sir Walter, quoted, [92].
Screen, [10], [35–37].
Seas, lunar (q. v.), [143].
Secchi, Father, [14], [15], [24], [25], [29], [30], [43], [59], [235].
Segmentations, [30], [31].
Self-luminosity, [215].
Sextant, [224].
Shadows. (See [Lunar].)
Shakspeare, quoted, [60], [220].
Sheaves, [68].
Shelbyville, [42], [43].
Sherman, observations at, [88].
Ship, comparison, [133].
(See [Steamer].)
Shooting-stars, [35], [193], [196], [198], [199].
(See [Falling], [Meteors].)
Sicily, [50].
(See [Etna].)
Siemens, Sir William, [111].
Sierra Nevada, [151], [160], [180].
Signal Service, [90].
Silicon, [107].
Sirius, [179], [222–224], [236–238].
Slits, [59], [63], [64].
Smoked Glass, [11].
Snow-flakes, [19], [35].
Snow-like Forms, [25].
Sodium, [237].
Solar Engine, [75], [109].
Solar Light (q. v.), [13].
Solar Physics, [4], [12], [14].
(See [Sun].)
Solar System, [228], [229].
South America (q. v.), [80].
South Carolina, meteors, [194], [195].
(See [Charleston].)
Southern Cross, [234].
Space, [181], [211], [224], [227], [229].
Spain, expedition, [44].
Sparks, [107], [108].
Spectra, [231], [237].
Spectres, [54], [55].
(See [Brocken].)
Spectroscope, [7], [50], [59], [61], [63], [64], [130], [176], [198], [219], [222], [233–235], [240].
Spectrum, [65], [235].
Spectrum Analysis, [12].
Speculations, [193].
Spinning-wheel, [115].
Springfield Observations, [44].
Spurs, [208], [212], [215].
Star of Bethlehem, [229].
(See [Tycho].)
Stars:
new study, [3];
location, [4];
size, [4], [230];
seen in darkness, [35];
self-shining suns, [35], [118];
host, [117];
variety, [118];
five, [118];
elements, atmosphere, [179];
showers (see [Meteors]), [195];
seen through comet, [212], [215];
chapter, [221–250];
analysis, children, [222];
distances, [223];
intervals, [224], [227], [229];
colors (q. v.), glory, [227];
new, fading, [230];
double, [233];
relation to man (q. v.), [233];
fixed, [233];
changing place, [234];
mass, [237];
ages, [238];
photographed, [244], [247];
chart, [247];
death, [248].
(See [Falling], [Planets], [Shooting].)
Steam, [74], [75].
Steamers, [21], [73], [115].
Steel, melted, [104–108].
(See [Iron].)
Stellar Spectra (q. v.), [222], [236], [237], [244], [245].
Stevenson, George, [111].
Stewart’s Observations, [88].
Stonehenge, [1–3].
Stones:
from heaven, [175], [176], [186], [187], [191], [193];
Iowa, [199], [200].
(See [Meteorites].)
Stonyhurst Records, [88].
Sumbawa Observations, [181].
Sunbeams:
lifting power, [72];
Laputa, [73];
printing, [74];
motes, [215].
(See [Light].)
Sun:
practical observations in Washington, [2], [3];
new study, [3];
surroundings, [4], [35–69];
distance, [4–6];
size, [5], [6];
a private, [6];
views, [6–12], [15], [16], [20];
details, [7];
fire, [8], [91], [92];
telescopic view, [8];
axis, [9];
revolutions, [10];
surface, [17];
paper record, [18];
heat (q. v.) and eye, [19];
drawings exaggerated, [29], [30];
something brighter, [32];
atmosphere, [33], [34];
slits, [59];
miniature, [64];
flames (q. v.), [69];
energy, 70–116 (see [Heat]);
versatile aid, [74];
children, [75], [222];
shrinkage, [99];
ground up, [100];
emissive power, [104];
constitution and appearance, [111];
god, [116];
self-shining, [118];
studied from mountains, [167];
affected by dust (q. v.), [185];
and comet, [216];
elements, [233];
a star, [237];
life, [238];
candle, [249];
anecdote, [250].
(See [Solar].)
Sunrise, [234].
Sunset, [181], [182].
(See [Twilight].)
Suns:
millions, [224];
dwindling, [227];
periods, [241].
Sun-spots, 1–34 passim;
ancient, [8];
early observations, [8];
changing, [9];
great, [10], [20], [24];
individuality, darker, [11];
leaves (q. v.), [11], [12];
how observed, [18], [19];
typical, [21], [22];
relative size, [20];
hook-shaped (see [Plume]), [24];
signs of chaos, [27];
double, [32];
weather, [76], [90];
periodicity, [76–78];
temperature, [83];
records, [85];
variations, [87];
(1870), [9], [15], [16], [20];
(1873), [20–24];
(1875), [25], [28], [30];
(1876), [30], [32];
(1882), [80], [83–86], [90].
Superga, [38].
Swift, Dean, [73], [131], [132].
(See [Gulliver].)
Sword Meteor (q. v.), [175].
Tacchini’s Investigations, [43], [49], [62], [66], [68].
Tail, [215], [216].
(See [Comets].)
Tan, [71].
Taylor, Bayard, [139].
Telephone, [84], [89].
Telescopes:
many, [17];
best, [134];
alone, [227], [230];
use, [233], [234].
Temperature, [101], [102], [108];
of space, [224], [227].
Terminator, [147].
Thermometer, [71], [93], [102];
low, [160], [163].
Time, small divisions, [241].
Tippoo Saib, [221].
Total Eclipse (q. v.), 39–48 passim, [55], [59].
Trees, lacking, [168].
Tribune, The New York, [84].
Trinity Church, [72].
Trocadéro, [112].
Trouvelot, E. L., [119], [123], [225].
Turin, [38].
Twilight, small, [38].
Tycho, [144], [229].
(See [Star].)
Tyndall, [98].
Umbra, [11], [12], [19], [20].
United States, comparison, [24].
Uranus, [3], [196].
Vapor, [28].
Vega, [235], [246].
Vegetables, [74].
Veils, [14], [17].
Venus, [118].
Vernier, [3].
Vesuvius:
crater, [155], [157];
eruption, [181], [183].
(See [Naples].)
Vibrations, [72].
Victoria, [115].
Viscous Fluid, [26].
Vital Force, [14].
Vogel, H. C., [64], [66].
Voids, [181], [227].
Volcanoes, [27], [28];
in moon, [167], [193].
Wandering Star, [101].
(See [Comets], [Falling].)
Washington:
Observatory, [2], [86–88];
telescope, [122];
Monument, [182].
Water, [152];
in man, [221].
Waterloo, [80].
Water-wheel, [111].
Watson’s Observations, [49].
Wheat, prices, [79].
(See [Breadstuffs], [Corn], [Grain], [Sun-spots].)
Wheel, comparison, [10].
Whirlpools, [28], [31].
Whirlwinds, [23], [31].
White Light (q. v.), [48], [62], [63].
Whitney, Mount, [177].
Willow-leaves (q. v.), [11], [12], [14].
Wing, simile, [215].
Winlock, Professor, [44].
Withered Surfaces, [168], [171].
Wood-engraving, [50].
Worlds and Clouds, [249].
Wrinkles, [172].
Xeres, Spain (q. v.), [44], [53].
Young, Professor:
spectroscope, [44], [50], [65], [234];
observations, [56], [59], [61], [68], [69];
magnetism, [87], [88];
radiation, [101].
Zodiacal Light, [55].

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