Part 21

The Impact of Estimation Errors on Evaluations of Timber Production Opportunities, by Dennis L. Schweitzer. USDA Forest Serv. Res. Pap. NC-43, 18 p., illus. 1970.

User Evaluation of Campgrounds on Two Michigan National Forests, by Robert C. Lucas. USDA Forest Serv. Res. Pap. NC-44, 15 p., illus. 1970.

System Identification Principles in Studies of Forest Dynamics, by Rolfe A. Leary. USDA Forest Serv. Res. Pap. NC-45, 38 p., illus. 1970.

Skiing in the Great Lakes State: the Industry and the Skier, by William A. Leuschner. USDA Forest Serv. Res. Pap. NC-46, 42 p., illus. 1970.

Proceedings of the Ninth Lake States Forest Tree Improvement Conference, August 22-23, 1969. USDA Forest Serv. Res. Pap. NC-47, 34 p. 1970.

A Water Curtain for Controlling Experimental Forest Fires, by Von J. Johnson. USDA Forest Serv. Res. Pap. NC-48, 7 p., illus. 1970.

Wildness Ecology: A Method of Sampling and Summarizing Data for Plant Community Classification, by Lewis F. Ohmann and Robert R. Ream. USDA Forest Serv. Res. Pap. NC-49, 14 p., illus. 1970.

ABOUT THE FOREST SERVICE....

As our Nation grows, people expect and need more from their forests--more wood; more water, fish, and wildlife; more recreation and natural beauty; more special forest products and forage. The Forest Service of the U.S. Department of Agriculture helps to fulfill these expectations and needs through three major activities:

. Conducting forest and range research at over 75 locations ranging from Puerto Rico to Alaska to Hawaii.

. Participating with all State forestry agencies in cooperative programs to protect, improve, and wisely use our Country's 395 million acres of State, local, and private forest lands.

. Managing and protecting the 187-million acre National Forest System.

The Forest Service does this by encouraging use of the new knowledge that research scientists develop; by setting an example in managing, under sustained yield, the National Forests and Grasslands for multiple use purposes; and by cooperating with all States and with private citizens in their efforts to achieve better management, protection, and use of forest resources.

Traditionally, Forest Service people have been active members of the communities and towns in which they live and work. They strive to secure for all, continuous benefits from the Country's forest resources.

For more than 60 years, the Forest Service has been serving the Nation as a leading natural resource conservation agency.

* * * * *

Transcriber's Notes

This is a compilation of four separate reports, each having their own table and figure numbers. I have retained the original table and figure numbers due to all the references made to them within the text. However I did reindex the footnotes for the complete compilation. I made minor punctuation corrections, modified the table formats, moved some illustrations, and made the following typo corrections:

Table of Contents: Changed "Occurence" to "Occurrence". Originally: The Possible Occurence of the Great Plains Wolf in Northeastern Minnesota

Page 5: Added missing parenthesis after "individuals". Originally: the same color (with the exception of a few black or white individuals (see Mech and Frenzel, page 60)

Page 27, Deleted repeated word "the". Originally: When still on the the ice about 15 feet from shore,

Page 34, Literature Cited: Changed "Vegetatation" to "Vegetation". Originally: Ohmann, L. F., and Ream, R. R. 1969 Vegetatation studies in the BWCA

Page 37: Changed "repreductive" to "reproductive". Originally: lungs, liver, kidneys, repreductive tracts

Page 40: Changed "wildnerness" to "wilderness". Originally: while in the wildnerness more males were taken

Page 41: Changed "decidous" to "deciduous". Originally: The deciduous first incisors of fawns and the decidous

Page 42: Changed "end" to "and". Originally: from wolf-killed deer end examined grossly in the field

Page 42, Figure 9: Changed "discoverd" to "discovered". Originally: A permanent first premolar (arrow) was discoverd in M-8.

Page 47: Changed "wildnerness" to "wilderness". Originally: not surprising that in the wildnerness area