SCIENCE-ADVERTISEMENTS 



From the Wide Field of 

 Biology 



those facts are selected — in HUN- 

 TER'S CIVIC BIOLOGY— that re- 

 late directly to the well-being of a 

 community. 



The material is presented in a series 

 of practical problems relating to vital, 

 everyday topics which appeal to the 

 interests of the average boy and girl. 

 The book has a minimum use of tech- 

 nical and scientific terms, and a liberal 

 number of instructive illustrations, 

 color pictures, and graphic diagrams. 



HUNTER'S CIVIC BIOLOGY 



PRESENTED IN PROBLEMS 

 By George William Hunter, A.M., Head of 

 the Department of Biology, DeWitt Clinton 

 High School, New York, N. Y., author of 

 Elements of Biology, Essentials of Biology, 

 etc. Price, $1.25. 



AMERICAN BOOK COMPANY 



New Yopk Cincinnati Cliieago 



Just Issued 

 in new form 



The Wentworth-Smith 

 Trigonometry 



Two new volumes recently added to this 

 new Wentworth-Smith Series, make the 

 trigonometries even more adaptahle for 

 school use : - 



Plane Trigonometry and Tables. 8vo, 

 cloth, 188+104 pp. $1.10. 

 Plane Trigonometry (without tables). 

 8vo, cloth, 188-1-20 pages. 90 cents. 

 Plane and Spherical Trigonometry and 

 Tables. 8vo,oloth, 230+104 pp. $1.35. 

 Plane and Spherical Trigonometry 

 (without Tables). 8vo, cloth, 230+26 

 pp. $1.15. 



Just 'Published 



Natural History of 

 HAWAII 



By William Alanson Bryan, B.S., Professor of 

 Zoology and Geology in the College of Hawaii. 



A reliable and readable reference book on things 

 Hawaiian. Suited to the needs of the general reader, 

 student, library or scientific worker. 



ILLUSTRATED with 117 full page plates from 441 photo- 

 graphs elucidating the ethnology of the native people, the 

 geology and topography of the islands and figuring more 

 than 1000 of the common or interesting species of plants 

 and animals to be found in the native and introduced fauna 

 and flora of Hawaii. 



CONTENTS IN 37 CHAPTERS i— Section 1, The Hawaiian 

 People; Section 2, The Geology, Geography and Topogra- 

 phy of the Hawaiian Islands; Section 3, The Flora of the 

 Group: Section 4, Agriculture and Horticulture in Hawaii; 

 Section 5, The Animal Life of the Group; Complete Index, 

 Glossary and Compendium, 



Ov 



• 500 pages of text 7x10^ inches, Cloth bound, 

 Price postpaid $5.60 (net). 



ADDRESS ORDERS DIRECT TO THE AUTHOR 

 P. O. BOX 38 HONOLULU. HAWAII 

 Or to the following authorized distributors; 

 Thriim's Limited, Fort St., Honolulu, Hawaii. 

 H. S. Crocker Co., 665-571 Market St., San Francisco. 

 G. E. Stechert & Co., 151-155 W. 25th St., New York. 

 G. E. Stechert & Co., 2 Star Yard, Carey Street W. C, London. 



Send for descriptne circulars and sample 

 pages 



PRINCIPLES OF 



STRATIGRAPHY 



BY 



AMADEUS W. GRABAU, S.M., S.D. 



PROFESSOR OF PALAEONTOLOGY IN 

 COLUMBIA UNIVERSITY 



Large Octavo, 1150 pages, with 254 illustrations in the text. 

 Cloth bound, price, S7.50. 



Send for descriptive circular 



A. G. SEILER & CO. 



PUBLISHFRS 

 1224 Amsterdam Avenue NEW YORK, N. Y. 



