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Volume 9, Number 10
January, 1935

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 lO¢ each by addressing the Grand Canyon Natural History Association, Grand Canyon, Arizona.

M. R. Tillotson,
Donald Edward McHenry,
Acting Park Naturalist

Table of Contents

Quaking Aspen - Its Future in the Park
     Junior Naturalist D. E. McHenry

Some Wildlife Observations on the Canyon Floor
     Ranger Naturalist Russell Grater

Rock Slide in the Coconino Sandstone
     Ranger Naturalists Russell Grater and Harold H. Hawkins

Static Electricity
     Ranger Naturalist Harold H. Hawkins

Illustration and Lettering by Tom Jackson

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