ts among the stars. This also first appeared in the periodical
above mentioned.

In conclusion, the author wishes for his readers as great a pleasure in
the use of the telescope as he himself has enjoyed.

G. P. S.

BOROUGH OF BROOKLYN, NEW YORK, _January, 1901_.

CONTENTS

CHAPTER I PAGE

THE SELECTION AND TESTING OF A GLASS 1

How to get a good telescope--Difference between reflectors and
refractors--How a telescope is made achromatic--The way to test
a 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 their
neighbors Auriga, the Lynx, Hydra, Sextans, and Coma Berenices.

CHAPTER IV

VIRGO AND HER NEIGHBORS 57

Crater and Corvus, Hydra, Virgo, the "Field of the Nebulae,"
Libra, Booetes, and the great Arcturus, Canes Venatici, and
Corona Borealis.

CHAPTER V

IN SUMMER STAR-LANDS 75

Scorpio and its red-green gem, Ophiuchus, Sagittarius, Scutum
Sobieskii, Capricornus, Serpens, Hercules, Draco, Aquila, and
Delphinus.

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 their
photographic 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 ringed
planet--Saturn's moons and Roche's limit--Mars and its white
polar caps and so-called seas and continents--Venus and her
atmosphere--The peculiar rotations of Venus and Mercury.

CHAPTER IX

THE MOUNTAINS AND PLAINS OF THE MOON AND THE SPECTACLES OF THE
SUN 156

Peculiarities of the lunar landscapes--The so-called seas, the
craters, the