HALF-HOURS WITH THE TELESCOPE
Being a popular guide to the use of the telescopeas a means of amusement and instruction.
BY
Richard A. Proctor, B.A., F.R.A.S.,
Author of "Saturn and its System," Etc.
With Illustrations on Stone and Wood.
An undevout astronomer is mad:
True, all things speak a God; but, in the small
Men trace out Him: in great He seizes man.
YOUNG.
New York:
G.P. Putnam's Sons.
1873.
London:
Printed by William Clowes and Sons, Stamford Streetand Charing Cross.
Fronticepeice
| Map I. The Sky Jan. 20, 10 P.M. Feb. 19, 8 P.M. Mar. 21, 6 P.M. |  |
| Map II. The Sky Apr. 20, 10 P.M. May 21, 8 P.M. Jun. 21, 6 P.M. |  |
| Map III. The Sky Jul. 22, 10 P.M. Aug. 23, 8 P.M. Sep. 23, 6 P.M. |  |
| Map IV. The Sky Oct. 23, 10 P.M. Nov. 22, 8 P.M. Dec. 21, 6 P.M. |  |
PREFACE.
The object which the Author and Publisher of this little work haveproposed to themselves, has been the production, at a moderate price, ofa useful and reliable guide to the amateur telescopist.
Among the celestial phenomena described or figured in this treatise, byfar the larger number may be profitably examined with small telescopes,and there are none which are beyond the range of a good 3-inchachromatic.
The work also treats of the construction of telescopes, the natu