_A Brief Guide to the Celestial Ruby_, by PHILALETHES (17th century)



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THE USEFUL KNOWLEDGE SERIES

Cloth, One Shilling net each

List of the first thirty-four volumes issued in the new style with
Pictorial Wrappers:--

WIRELESS TELEGRAPHY. By ALFRED T. STORY.

A PIECE OF COAL. By K.A. MARTIN, F.G.S.

ARCHITECTURE. By P.L. WATERHOUSE.

THE COTTON PLANT. By F. WILKINSON, F.G.S.

PLANT LIFE. By GRANT ALLEN.

WILD FLOWERS. By REV. PROF. G. HENSLOW, F.L.S., F.G.S.

THE SOLAR SYSTEM. By G.F. CHAMBERS, F.R.A.S.

ECLIPSES. By G.F. CHAMBERS, F.R.A.S.

THE STARS. By G.F.CHAMBERS, F.R.A.S.