24 MESSRS. LONGMANS & CO.'S STANDARD AND GENERAL WORKS. 



Popular Science (Natural History, &e.). 



Butler. OUR HOUSEHOLD INSECTS. 

 An Account of the Insect-Pests found in 

 Dwelling-Houses. By EDWARD A. BUTLER, 

 B.A., B.Sc. (Lond.). With 113 Illustra- 

 tions. Crown 8vo., 35. 6d. 



Furneaux (W.). 



THE OUTDOOR WORLD; or The 

 Young Collector's Handbook. With 18 

 Plates (16 of which are coloured), and 549 

 Illustrations in the Text. Crown 8vo., 

 75. 6d. 



BUTTERFLIES AND MOTHS (British). 

 With 12 coloured Plates and 241 Illus- 

 trations in the Text. Crown 8vo., 75. 6d. 



LIFE IN PONDS AND STREAMS. 

 With 8 coloured Plates and 331 Illustra- 

 tions in the Text. Crown 8vo., 75. fid. 



Hartwig (DR. GEORGE). 



THE SEA AND ITS LIVING WONDERS. 

 With 12 Plates and 303 Woodcuts. 8vo., 

 75. net. 



THE TROPICAL WORLD. With 8 

 Plates and 172 Woodcuts. 8vo., 75. net. 



THE POLAR WORLD. With 3 Maps, 

 8 Plates and 85 Woodcuts. Svo., 75. net. 



THE SUBTERRANEAN WORLD. With 



3 Maps and 80 Woodcuts. 8vo., js. net. 



THE AERIAL WORLD. With Map, 8 

 Plates and 60 Woodcuts. 8vo., 75. net. 



HEROES OF THE POLAR WORLD. With 



19 Illustrations. Cr. 8vo., 2s. 



WONDERS OF THE TROPICAL FORESTS. 

 With 40 Illustrations. Cr. Svo., 2s. 



WORKERS UNDER THE GROUND.^ \\.\\ 



29 Illustrations. Cr. 8vo., 25. 



MARVELS OVER OUR HEADS. With 

 29 Illustrations. Cr. 8vo., 2s. 



SEA MONSTERS AND SEA BIRDS. 

 With 75 Illustrations. Cr. 8vo., 2s. 6rf. 



DENIZENS OF THE DEEP. With 1 17 

 Illustrations. Cr. 8vo., 25. 6d. 



Hartwig (DR. GEORGE) continued. 



VOLCANOES AND EARTHQUAKES. 



With 30 Illustrations. Cr. 8vo., 2s. 6rf. 



WILD ANIMALS OF THE TROPICS. 

 With 66 Illustrations. Cr. 8vo., 35. 6d. 



Helmholtz. POPULAR LECTURES ON 

 SCIENTIFIC SUBJECTS. By HERMANN VON 

 HELMHOLTZ. With 68 Woodcuts. 2 vols. 

 Cr. 8vo., 35. 6d. each. 



Hudson (W. H.). 



BRITISH BIRDS. With a Chapter 

 on Structure and Classification by FRANK 

 E. BEDDARD, F.R.S. With 16 Plates (8 

 of which are Coloured), and over 100 Illus- 

 trations in the Text. Cr. 8vo., 75. 6d. 



BIRDS IN LONDON. With 17 Plates 

 and 15 Illustrations in the Text, by BRYAN 

 HOOK, A. D. McCoRMicK, and from 

 Photographs from Nature, by R. B. 

 LODGE. Svo., 125. 



Proctor (RICHARD A.). 



LIGHT SCIENCE FOR LEISURE HOURS. 

 Familiar Essays on Scientific Subjects. 3 

 vols. Cr. Svo., 55. each. 



Ro UGH WA YS MADE SMOOTH. Fami- 

 liar Essays on Scientific Subjects. Crown 

 8vo., 3S. 6d. 



PLEASANT WA vs IN SCIENCE. Crown 



Svo., 35. 6d. 



NATURE STUDIES. By R. A. PROC- 

 TOR, GRANT ALLEN, A. WILSON, T. 

 FOSTER and E. CLODD. Crown 8vo., 

 35. 6rf. 



LEISURE READINGS. By R. A. PROC- 

 TOR, E. CLODD, A. WILSON, T. FOSTER 

 and A. C. RANYARD. Cr. Svo., 3$. 6d. 



*^* For Mr. Proctor's other books sec pp. 13, 

 28 and 31, and Messrs. Longmans & Co. 's 

 Catalogue of Scientific Works. 



Stanley. A FAMILIAR HISTORY OF 

 BIRDS. By E. STANLEY, D.D., formerly 

 Bishop of Norwich. With 160 Illustrations. 

 Cr. 8vo., 35. 6d. 



