Borough of Brooklyn, New York, January, 1901.


CONTENTS

PAGE
[CHAPTER I]
[The Selection and Testing of a Glass][1]
How to get a good telescope—Difference between reflectors andrefractors—How a telescope is made achromatic—The way to testa telescope on stars.
[CHAPTER II]
[In the Starry Heavens][19]
Orion and its wonders, Lepus, Canis Major, Argo, Monoceros,Canis Minor, and the Head of Hydra.
[CHAPTER III]
[From Gemini To Leo and Round About][38]
The zodiacal constellations Gemini, Cancer, and Leo, and theirneighbors Auriga, the Lynx, Hydra, Sextans, and Coma Berenices.
[CHAPTER IV]
[Virgo and Her Neighbors][57]
Crater and Corvus, Hydra, Virgo, the "Field of the Nebulæ,"Libra, Boötes, and the great Arcturus, Canes Venatici, andCorona Borealis.
[CHAPTER V]
[In Summer Star-lands][75]
Scorpio and its red-green gem, Ophiuchus, Sagittarius, ScutumSobieskii, Capricornus, Serpens, Hercules, Draco, Aquila, andDelphinus.
[CHAPTER VI]
[From Lyra To Eridanus][97]
Lyra and its brilliant Vega, Cygnus, Vulpecula, Aquarius,Equuleus, Pegasus, Cetus, and Eridanus.
[CHAPTER VII]
[Pisces, Aries, Taurus, and the Northern Mars][117]
The first double star ever discovered, the Pleiades and theirphotographic wonders, the Royal Family of the Sky, Andromeda,Cassiopeia, Perseus and Cepheus, Ursa Major, Camelopardalus,Ursa Minor, and the Pole Star.
[CHAPTER VIII]
[Scenes on the Planets][139]
Jupiter, its belts and its moons—Saturn, the ringedplanet—Saturn's moons and Roche's limit—Mars and its whitepolar caps and so-called seas and continents—Venus and heratmosphere—The peculiar rotations of Venus and Mercury.
[CHAPTER IX]
[The Mountains and Plains of the Moonand the Spectacles of the Sun][156]
Peculiarities of the lunar landscapes—The so-called seas, thecraters, the ring mountains, the inclosed plains, the mountainranges, Tycho's mysterious streaks, and other lunar featuresdescribed—How to view the sun and its spots.
[CHAPTER X]
[Are There Planets Among the Stars?][183]
Significance of Dr. See's observations—Why our telescopes donot show planets circling around distant suns—Reasons forthinking that such planets may exist—The bearing of stellarevolution on the question.
[INDEX][193]

CHAPTER I

THE SELECTION AND TESTING OF A GLASS

"O telescope, instrument of much knowledge, more precious than any scepter! Is not he who holds thee in his hand made king and lord of the works of God?"—John Kepler.