NEW YORK:

G.P. PUTNAM'S SONS.

1873.

LONDON:

PRINTED BY WILLIAM CLOWES AND SONS, STAMFORD STREET
AND CHARING CROSS.




PREFACE.


The object which the Author and Publisher of this little work have
proposed to themselves, has been the production, at a moderate price, of
a useful and reliable guide to the amateur telescopist.

Among the celestial phenomena described or figured in this treatise, by
far the larger number may be profitably examined with small telescopes,
and there are none which are beyond the range of a good 3-inch
achromatic.

The work also treats of the construction of telescopes, the nature and
use of star-maps, and other subjects connected with the requirements of
amateur observers.