By the same Author.

£

THE STARS IN TWELVE GNOMONICMAPS;

The Maps are given in duplicate, two Steel Plates (coloured)presenting the usual features of Star-maps, including Constellation figures, while two Stereo Plates exhibit the Stars and Milky Wayalone on a black background. Royal 4to. Price, complete, withIntroduction, in stiff paper cover, 7s.; steel plates, coloured, each2s. 6d. ; stereo plates, each 6d.

“ The best star-maps we have seen.”— Header.

“ The most generally useful series that have appeared.”— Intel-lectual Observer.

A NEW STAR-ATLAS,

In 12 Circular Maps, 13 inches in diameter, containing all theStars visible to the naked eye, and about 1,500 objects of in-terest (Red Stars, Double Stars , &c.). Photolithographed byA. Brothers, F.R.A.S. With coloured Index Maps (see pre-ceding announcement) and a letterpress Introduction. SecondEdition. In small folio ; price, with Index Maps, 25s. ; without,.£1 ; cloth (bevelled edges).

“ I have no objection to your mentioning my high approval ofthis work .”—From a letter by Sir John Herschel .

“ A splendid book, an indispensable companion for all specu-lative astronomers who can afford to use it. These maps are a farbetter substitute for the heavens than anything we have yet pos-sessed. Their real value lies in their wonderful accuracy, unitedwith their extreme convenience for reference.”— Guardian .

“ A set of maps of the heavens which are as excellent in meredetails of printing as they are accurate and reliable in an astrono-mical sense .”—Popular Science Review.

' SMALLER STAR-ATLAS j

Octavo Edition of the same, showing the same “ Objects,” andall Stars down to the fifth magnitude inclusive. With simpleexplanatory Letterpress, Index Maps, &c. Third Edition, price 5s.

“ Any one who can understand a map can use Mr. Proctor’slittle Atlas .”—Quarterly Journal of Science.