(4) 4-6 A strongly conservationist tone permeates these surveys of the fragile condition of our natural resources. Each book is a whirlwind tour through major environmental issues covering a host of earth science topics. While some features--particularly profiles of environmentalists--are intriguing, none are covered in much depth. Color photographs and diagrams add excellent detail to the crowded pages. Ind.

Reviewer: Danielle J. Ford

(4) 4-6 Discoveries series. Illustrated by Marje Crosby-Fairall & Ann Winterbotham. Tight, overcrowded layouts, filled with color drawings, boxed quotes, and archival photographs, present an overview of polar exploration. The book traces the foot and air journeys of Byrd, Peary, Amundsen, and other explorers, and includes a section on the contemporary scientific study conducted in the Arctic and Antarctic. A time line is included. Ind.

Reviewer: Peter D. Sieruta

(3) 4-6 Maps and Mapmakers series. Illustrated by George Fryer. This book deals with the abstract concept of charting systems that intrinsically lack landmarks. Ancient and modern navigational methods are covered, including celestial and inertial methods. Bramwell also discusses aerial navigation charts and air traffic control methods. Well-captioned diagrams, drawings, and color photographs enhance the text. Glos., ind.

Reviewer: Harry Clement Stubbs

(3) 4-6 Maps and Mapmakers series. Illustrated by George Fryer. These books describe in detail the basic ideas behind maps and charts, the measurements needed to make them, and such concepts as projections and scale. The various codes and symbols that tell the reader what sort of information is supplied in a map (physical or political geography, products, climate, or population) are clearly explained. Glos., ind.

Reviewer: Harry Clement Stubbs

(4) 4-6 Maps and Mapmakers series. Illustrated by George Fryer. This book is more a description of what we currently understand about astronomical objects--planets, stars, and galaxies--than the equipment and techniques involved in mapping them. Constellation maps are included, but most of the plentiful photos and diagrams are of such things as individual planets and the electromagnetic spectrum. Glos., ind.

Reviewer: Harry Clement Stubbs

(3) 4-6 Maps and Mapmakers series. Illustrated by George Fryer. These books describe in detail the basic ideas behind maps and charts, the measurements needed to make them, and such concepts as projections and scale. The various codes and symbols that tell the reader what sort of information is supplied in a map (physical or political geography, products, climate, or population) are clearly explained. Glos., ind.

Reviewer: Harry Clement Stubbs

(3) 4-6 Maps and Mapmakers series. Illustrated by George Fryer. These books describe in detail the basic ideas behind maps and charts, the measurements needed to make them, and such concepts as projections and scale. The various codes and symbols that tell the reader what sort of information is supplied in a map (physical or political geography, products, climate, or population) are clearly explained. Glos., ind.

Reviewer: Harry Clement Stubbs