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Volume 7, Number 5
August, 1932

National Park Service
Grand Canyon National Park
Grand Canyon Natural
History Association

This publication is issued monthly for the purpose of recording observations and of making known the results of research and scientific investigation in the Grand Canyon region in the fields of natural history, history and related subjects. It is published by the Natural History Association for the Grand Canyon National Park. Membership in this Association is $1.00 per year and includes a subscription to Nature Notes. Additional copies of Nature Notes may be obtained at 10¢ each by addressing The Grand Canyon Natural History Association, Grand Canyon, Arizona.

M. R. Tillotson,
Edwin D. McKee,
Park Naturalist

Table of Contents

A Summary of Grand Canyon Minerals
     Hugh H. Waesche, Ranger Naturalist

Canyon Storm
     Ciwa Lynch, Tempe, Arizona

A Lesson in Erosion
     A. R. Croft, Ranger Naturalist

An Insect Observation
     Clyde C. Searl, Ranger Naturalist

Recent Bird Records from Havasu Canyon
     Randolph Jenks, Museum of Northern Arizona

Field Observations

Illustrations by George Smithson

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