LONGMANS, GREEN, ^ COr S PUBLICATIONS. 

 PRACTICAL ELEMENTARY BIOLOGY. 



By John Bidgood, B.Sc, F.L.S. With 226 Illustrations and full Index. 

 i2mo. 362 page^. $1,50. 



"The types described in the following pages have been selected as fairly 

 representing, in so far as they can be represented in a book of this size, the 

 vegetable and animal worlds. It is possible that a better selection might be 

 made, but not one, I think, of which the examples can be more conveniently 

 procured, cultivated, and examined, while retaining their capability of teaching 

 so much. . . . Many of the illustrations are new and have been drawn for 

 this book." — Author s Preface. 



A TEXT-BOOK OF ELEMENTARY BIOLOGY. 



By R. J. Harvey Gibson, M.A,, F.R.S.E. Demonstrator of Biology in 

 University College, Liverpool. Illustrated with 192 Engravings. Crown 

 8vo. 372 pages. $1.75. 



In this book the author has kept prominently in the foreground the depend- 

 ence of Biology on Chemistry and Physics, and the relationship of Morphologi- 

 cal and Physiological Details to General Principles. Great prominence has 

 been given to the Botanical Aspect of Biology. It contains chapters on Matter 

 and Energy, Protoplasm, Individual and Tribal Life — Distribution and Classi- 

 fication, The Morphology and Physiology of the Simplest Living Organisms — 

 Protista, Unicellular Plants — Protophyta, Unicellular Animals — Protozoa, 

 Metaphyta — Non-Vascularia, Metaphyta — Vasculana, Metazoa — Invertebrata, 

 Metazoa — Vertebrata, History of Biology, etc. 



*^ For other books on Botany, Biology, etc., see Longma?is, Green, e?^ Co.'s 

 Catalogue of Educational Works. 



ELEMENTARY PHYSIOGRAPHY. An Introduc- 

 tion to the Study of Nature. 



By John Thornton, M.A. With 10 Maps and 161 Illustrations. Crown 

 8vo. 256 pages. 80 cents. 



This volume is intended to serve as an introduction to Science. It supplies 

 such a knowledge of the facts and laws of Nature as is implied in the expres- 

 sive term Physische Erdkunde — an acquaintance with the physical phenomena 

 of the Earth. It contains chapters on Matter and its Properties, Gravitation 

 and Specific Gravity, Cohesion and Chemical Affinity, Work and Energy, 

 Chemical Action ; Rocks, their Composition, Classification, and Arrangement ; 

 Interior of the Earth, Volcanoes, etc. ; the Sea, the Polar Regions, and Ice of 

 the Sea ; the Atmosphere, Evaporation and Condensation, Dews, Mist, Fog, 

 Rain, and Snow ; the Sculpture of the Land, W^eather, and Climate. Changes 

 in the Earth's Surface ; Magnetism and Electricity of the Earth, Shape and 

 Movements of the Earth, etc. 



The third Edition contains a short account of recent researches on Dew, 

 and gives a simple explanation of Telescopes. 



ST. PAUL'S SCHOOL. 



" I have been using Thornton's Elementary Physiography for two years 

 with my classes beginning the study of science. I find it a most admirable 

 book and can certainly recommend it from a personal knowledge of it. I 

 shall continue its use." — Dr. J. Milnor Coit, Concord, N. H. 



c 



LONGMANS, GREEN, & CO., 15 East Sixteenth Street, New York. 



