FREDERICK MALCOLM KNAPP

Student in the College of Forestry,

University of Washington.

[Illustration]

SEATTLE, WASHINGTON

PUBLISHED QUARTERLY BY THE UNIVERSITY

APRIL, 1921

Entered as second class matter, at Seattle, under the Act of

July 16, 1894.

Motor Truck Logging Methods Engineering Experiment Station Series, Bulletin No. 12 · 第 9 / 52 题