Volume XXIII - 1992
90th Anniversary Edition

• Introduction - Kent J. Taylor
• Crater Lake National Park as a Field for Scientific Research - Lincoln Constance
• A Century of Measuring Lake Levels - Tom McDonough
• Clouds, Precipitation, and Snow - Gregg Fauth
• A "New" Date for Mount Mazama's Climactic Eruption - Ron Mastrogiuseppe and Steve Mark
• Earthquakes in the Crater Lake Area - Steve Mark and Ron Mastrogiuseppe
• Biodiversity in Red Blanket Canyon - Steve Mark
• Saving Bull Trout in Sun Creek - Mark Buktenica
• Mammals of the Pumice Desert - Ruth Monical and Stephen P. Cross
• Heresies of an Interpreter - Ted Haeger

Cover Photo: W. Drew Chick displaying transom of the boat Cleetwood to Park founder Will G. Steel on July 19, 1931. Steel had organized the U.S. Geological Survey expedition which brought the Cleetwood to make soundings of Crater Lake in 1886. Photo by Ansel Hall.

Disclaimer: With the exception of corrections to a few grammatical errors (to improve readability), Nature Notes is reproduced as it was originally published. Much has been learned about the natural history of Crater Lake National Park since these notes were first published, rendering some of the original conclusions inaccurate or invalid, just as determinations of today may be rendered "obsolete" 50-60 years hence. The reader is advised to consult more recent literature to obtain a current understanding of the topic.