3o MESSRS. LONGMANS & CO.'S STANDARD AND GENERAL WORKS. Popular Science (Natural History, &c). 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., 3s. 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., gilt edges, 65. net. Butterflies and Moths (British). With 12 coloured Plates and 241 Illus- trations in the Text. Crown 8vo., gilt edges, 6s. net. Life in Ponds and Streams. With 8 coloured Plates and 331 Illustra- tions in the Text. Crown 8vo., gilt edges, 6s. net. Hartwig (George). The Sea and its Living Wonders. With 12 Plates and 303 Woodcuts. 8vo., gilt top, 7s. net. The Tropical World. With 8 Plates and 172 Woodcuts. 8vo., gilt top, 7s. net. The I j olar World. With 3 Maps, 8 Plates and 85 Woodcuts. 8vo., gilt top, 75. net. The Subterranean World. With 3 Maps and 80 Woodcuts. 8vo., gilt top, 7s. net. Helmholtz. — Popular Lectures on Scientific Subjects. By Hermann von Helmholtz. With 68 Woodcuts. 2 vols. Cr. 8vo., 3s. 6d. each. Hudson (W. H.). Birds and Man. Large crown 8vo., 6s. net. Nature in Downland. With 12 Plates and 14 Illustrations in the Text by A. D. McCormick. 8vo., ios. 6d. net. 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. Crown 8vo., gilt edges, 6s. net. Millais. — The Natural History of the British Surface Feeding-Ducks. By John Guille Millais, F.Z.S., etc. With 6 Photogravures and 66 Plates (41 in Colours) from Drawings by the Author, Archibald Thorburn, and from Photo- graphs. Royal 4to., £6 6s. Proctor (Richard A.). Light Science for Leisure Hours. Familiar Essays on Scientific Subjects. Crown 8vo., 3s. 6d. Ro ugh Wa ys ma de Smoo th. F am i - liar Essays on Scientific Subjects. Crown 8vo., 3s. 6d. Plea sa nt Wa ys in Science . C rown 8vo., 3s. 6d. Nature Studies. By R. A. Proc- tor, Grant Allen, A. Wilson, T. Foster and E. Clodd. Cr. 8vo., 3s. 6d. Leisure Readings. By R. A. Proc- tor, E. Clodd, A. Wilson, T. Foster and A. C. Ranyard. Cr. 8vo. , 3s. 6d.
- * For Mr. Proctor's other books see pp. 17
and 35, and Messrs. Longmans & Co 's Cata- logue of Scientific Works.
