Twentieth Century Inventions Part 17

_MERRIFIELD._--A TREATISE ON NAVIGATION. For the Use of Students. By J. MERRIFIELD, LL.D., F.R.A.S., F.M.S. With Charts and Diagrams. Crown 8vo., 5_s._

_PARKER._--ELEMENTS OF ASTRONOMY. With Numerous Examples and Examination Papers. By GEORGE W. PARKER, M.A., of Trinity College, Dublin. With 84 Diagrams. 8vo., 5_s._ 6_d._ net.

_WEBB._--CELESTIAL OBJECTS FOR COMMON TELESCOPES. By the Rev. T. W.

WEBB, M.A., F.R.A.S. Fifth Edition, Revised and greatly Enlarged by the Rev. T. E. ESPIN, M.A., F.R.A.S. (Two Volumes.) Vol. I., with Portrait and a Reminiscence of the Author, 2 Plates, and numerous Ill.u.s.trations. Crown 8vo., 6_s._ Vol. II., with numerous Ill.u.s.trations. Crown 8vo., 6_s._ 6_d._

WORKS BY RICHARD A. PROCTOR.

THE MOON: Her Motions, Aspect, Scenery, and Physical Condition. With many Plates and Charts, Wood Engravings, and 2 Lunar Photographs.

Crown 8vo., 3_s._ 6_d._

OTHER WORLDS THAN OURS: the Plurality of Worlds Studied Under the Light of Recent Scientific Researches. With 14 Ill.u.s.trations; Map, Charts, etc. Crown 8vo., 3_s._ 6_d._

OUR PLACE AMONG INFINITIES: a Series of Essays contrasting our Little Abode in s.p.a.ce and Time with the Infinities around us. Crown 8vo., 3_s._ 6_d._

MYTHS AND MARVELS OF ASTRONOMY. Crown 8vo., 3_s._ 6_d._

LIGHT SCIENCE FOR LEISURE HOURS: Familiar Essays on Scientific Subjects, Natural Phenomena, etc. Vols. I. and II. Crown 8vo., 5_s._ each. Vol. I. Cheap Edition. Crown 8vo., 3_s._ 6_d._

THE ORBS AROUND US; Essays on the Moon and Planets, Meteors and Comets, the Sun and Coloured Pairs of Suns. Crown 8vo., 3_s._ 6_d._

THE EXPANSE OF HEAVEN: Essays on the Wonders of the Firmament. Crown 8vo., 3_s._ 6_d._

OTHER SUNS THAN 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 Amus.e.m.e.nt 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. Ill.u.s.trated 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 princ.i.p.al 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 princ.i.p.al 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 Ill.u.s.trations. Crown 8vo., 2_s._ 6_d._

ADVANCED GEOLOGY. A Manual for Students in Advanced Cla.s.ses and for General Readers. With over 300 Ill.u.s.trations, 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 Ill.u.s.trations. 8vo., 21_s._

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

MORGAN, M.A., D.Sc., F.R.S.E., Lecturer in Mathematics and Science, Church of Scotland Training College, Edinburgh. With 4 Maps and 243 Diagrams. Crown 8vo., 2_s._ 6_d._

_THORNTON._--Works by J. THORNTON, M.A.

ELEMENTARY PRACTICAL PHYSIOGRAPHY.

Part I. With 215 Ill.u.s.trations. Crown 8vo., 2_s._ 6_d._ Part II. With 98 Ill.u.s.trations. Crown 8vo., 2_s._ 6_d._

ELEMENTARY PHYSIOGRAPHY: an Introduction to the Study of Nature. With 13 Maps and 295 Ill.u.s.trations. With Appendix on Astronomical Instruments and Measurements. Crown 8vo., 2_s._ 6_d._

ADVANCED PHYSIOGRAPHY. With 6 Maps and 203 Ill.u.s.trations.

Crown 8vo., 4_s._ 6_d._

NATURAL HISTORY AND GENERAL SCIENCE.

_BEDDARD._--THE STRUCTURE AND CLa.s.sIFICATION OF BIRDS. By FRANK E.

BEDDARD, M.A., F.R.S., Prosector and Vice-Secretary of the Zoological Society of London. With 252 Ill.u.s.trations. 8vo., 21_s._ net.

_FURNEAUX._--Works by WILLIAM FURNEAUX, F.R.G.S.

THE OUTDOOR WORLD; or, The Young Collector's Hand-book. With 18 Plates, 16 of which are coloured, and 549 Ill.u.s.trations in the Text. Crown 8vo., 6_s._ net.

LIFE IN PONDS AND STREAMS. With 8 Coloured Plates and 331 Ill.u.s.trations in the Text. Crown 8vo., 6_s._ net.

b.u.t.tERFLIES AND MOTHS (British). With 12 Coloured Plates and 241 Ill.u.s.trations in the Text. Crown 8vo., 6_s._ net.

_HUDSON._--BRITISH BIRDS. By W. H. HUDSON, C.M.Z.S. With 8 Coloured Plates from Original Drawings by A. THORBURN, and 8 Plates and 100 Figures by C. E. LODGE, and 3 Ill.u.s.trations from Photographs. Crown 8vo., 6_s._ net.