HAN OURS: a Series of Essays on Suns--Old, Young, and
Dead. With other Science Gleanings. Two Essays on Whist, and
Correspondence with Sir John Herschel. With 9 Star-Maps and Diagrams.
Crown 8vo., 3_s._ 6_d._

HALF-HOURS WITH THE TELESCOPE: a Popular Guide to the Use of the
Telescope as a means of Amusement and Instruction. With 7 Plates. Fcp.
8vo., 2_s._ 6_d._

NEW STAR ATLAS FOR THE LIBRARY, the School, and the Observatory, in
Twelve Circular Maps (with Two Index-Plates). With an Introduction on
the Study of the Stars. Illustrated by 9 Diagrams. Cr. 8vo., 5_s._

THE SOUTHERN SKIES: a Plain and Easy Guide to the Constellations of
the Southern Hemisphere. Showing in 12 Maps the position of the
principal Star-Groups night after night throughout the year. With an
Introduction and a separate Explanation of each Map. True for every
Year. 4to., 5_s._

HALF-HOURS WITH THE STARS: a Plain and Easy Guide to the Knowledge of
the Constellations. Showing in 12 Maps the position of the principal
Star-Groups night after night throughout the year. With Introduction
and a separate Explanation of each Map. True for every Year. 4to.,
3_s._ 6_d._

LARGER STAR ATLAS FOR OBSERVERS AND STUDENTS. In Twelve Circular Maps,
showing 6000 Stars, 1500 Double Stars, Nebulae, etc. With 2
Index-Plates. Folio, 15_s._

THE STARS IN THEIR SEASONS: an Easy Guide to a Knowledge of the
Star-Groups. In 12 Large Maps. Imperial 8vo., 5_s._

ROUGH WAYS MADE SMOOTH. Familiar Essays on Scientific Subjects. Crown
8vo., 3_s._ 6_d._

PLEASANT WAYS IN SCIENCE. Crown 8vo., 3_s._ 6_d._

NATURE STUDIES. By R. A. PROCTOR, GRANT ALLEN, A. WILSON, T. FOSTER,
and E. CLODD. Crown 8vo., 3_s._ 6_d._

LEISURE READINGS. By R. A. PROCTOR, E. CLODD, A. WILSON, T. FOSTER,
and A. C. RANYARD. Crown 8vo., 3_s._ 6_d._

PHYSIOGRAPHY AND GEOLOGY.

_BIRD._--Works by CHARLES BIRD, B.A.

ELEMENTARY GEOLOGY. With Geological Map of the British
Isles, and 247 Illustrations. Crown 8vo., 2_s._ 6_d._

ADVANCED GEOLOGY. A Manual for Students in Advanced Classes
and for General Readers. With over 300 Illustrations, a
Geological Map of the British Isles (coloured), and a set of
Questions for Examination. Crown 8vo., 7_s._ 6_d._

_GREEN._--PHYSICAL GEOLOGY FOR STUDENTS AND GENERAL READERS. By A. H.
GREEN, M.A., F.G.S. With 236 Illustrations. 8vo., 21_s._

_MORGAN._--ELEMENTARY PHYSIOGRAPHY. Treated Experimentally. By AL