By the same Author.

OTHER WORLDS THAN OURSj

The Plurality of Worlds studied under the Light ofRecent Scientific Researches.

THIRD EDITION , REVISED AND ENLARGED.

With 14 Illustrations (6 coloured). Crown 8vo. price 10s. 6d.

“A most interesting work, on a very fascinating subject.”—Examiner.

“ A book treating learnedly, yet simply and intelligibly, of those» great questions concerning the laws of the universe of which theoutside world has lately heard so much and understood so little,and written in such excellent English that its literary merits arenearly equal to its scientific value.”— Scientific Opinion.

“ The views expressed as to the constitution of the siderealuniverse differ from those usually held, are clearly expressed andsupported by strong arguments and original and forcible evidence.Mr. Proctor has evidently considered this subject carefully. Inthe part of the book which relates to the solar system useful in-formation is more especially given to the non-scientific reader.”—Athenamm.

SATURN AND ITS SYSTEM j

With 14 finely finished Engravings on Steel and Copper .

8vo. price 14s.

“ Mr. Proctor is happy in his subject, and equally happy in histreatment of it. The illustrations are second to none we have everseen, and add greatly to the value of the book, the style of whichis really a model of a semi-special treatment of a scientific sub-ject.”— Reader.

“ Though professedly limited to one planet, the work is a valu-able treatise on general astronomy.”— Journal of Science.

“ Mr. Proctor’s new theory of the rings indefinitely raises ourestimate of the marvellous nature of the phenomena they exhibit.”— Spectator.

“ The illustrations are a marvel of vivid engraving in steel andcopper.”— Illustrated London News .