Temperature

To convert °Celsius to °Fahrenheit, multiply °C by 1.8 and add 32.

To convert °Fahrenheit to °Celsius, subtract 32 from °F and divide the

result by 1.8.

[Illustration: Landsat image shows complex linear and crescentic dunes

in the northeastern Taklimakan Desert of China.]

_In this desert there are a great many evil spirits and also hot winds;

those who encounter them perish to a man. There are neither birds above

nor beasts below. Gazing on all sides as far as the eye can reach in

order to mark the track, no guidance is to be obtained save from the

rotting bones of dead men, which point the way._

_Explorer Fa Xian describing the Taklimakan Desert of China about 400

A.D._

This publication is one of a series of general interest publications

prepared by the U.S. Geological Survey to provide information about the

earth sciences, natural resources, and the environment. To obtain a

catalog of additional titles in the series “General Interest

Publications of the U.S. Geological Survey,” write:

U.S. Geological Survey

Branch of Distribution

P.O. Box 25286

Denver, CO 80225

★ U. S. GOVERNMENT PRINTING OFFICE : 1992 0-332-326 QL 2

As the Nation's principal conservation agency, the Department of the

Interior has responsibility for most of our nationally-owned public

lands and natural and cultural resources. This includes fostering wise

use of our land and water resources, protecting our fish and wildlife,

preserving the environmental and cultural values of our national parks

and historical places, and providing for the enjoyment of life through

outdoor recreation. The Department assesses our energy and mineral

resources and works to assure that their development is in the best

interests of all our people. The Department also promotes the goals of

the Take Pride in America campaign by encouraging stewardship and

citizen responsibility for the public land and promoting citizen

participation in their care. The Department also has a major

responsibility for American Indian reservation communities and for

people who live in Island Territories under U.S. Administration.

Cover Photographs:

[Illustration: Granite Mountain in the Great Basin Desert (photograph by

Terrence Moore).]

[Illustration: Sonoran Desert (photograph by Peter Kresan).]

[Illustration: Zabriskie Point in Death Valley, California (photograph

by Peter Kresan).]

[Illustration: Artists Point in Monument Valley (photograph by Peter

Kresan).]

[Illustration: Death Valley, California (photograph by Cecil

Stoughton).]

[Illustration: Cacti in the Sonoran Desert (photograph by John Olson).]

[Illustration: Back Cover]

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