1918. The Motor Truck in the Logging Industry. H. H. Warwood. Timberman. April 1. Page 74. (Periodical). 1918. Road Construction for Motor Trucks. Jay C. Smith. Timberman. April 1. Page 38. (Periodical). 1918. Adjustable Reach Logging Trailer. American Lumberman. May 18. Page 63. (Periodical). 1918. Demonstrating Duplex Trucks. American Lumberman. June 1. Page 63. (Periodical). 1918. Modern Motor Truck Solves Difficult Logging Problems. West Coast Lumberman. July 1. Page 18D. (Periodical). 1918. Motor Trucks in Winter Logging. A. R. Hilliard. West Coast Lumberman. Sept. 1. Page 25. (Periodical). 1919. The Effect of Changed Conditions Upon Forestry. W. W. Ashe. Journal of Forestry. Oct. 1. Page 657. (Periodical). 1919. Puget Sound Logger Tells Congress How to Log With Motor Trucks. West Coast Lumberman. October. Page 25. (Periodical). 1920. Air Brakes for Trucks. Timberman. Mar. 1. Page 48g. (Periodical). The writer has drawn freely from the material found in the above periodicals and trade journals, but wishes to acknowledge the greater bulk of information in writing this paper received from the various truck salesmen and truck operators who were interviewed personally. Without their assistance, the gathering of this information would have been impossible. Publications of the Engineering Experiment Station University of Washington =Bulletin No. 1=--Creosoted Wood Stave Pipe and Its Effect Upon Water for Domestic and Irrigational Uses. 1917. (Bureau of Industrial Research.) 20 pp. Price, 25 cents. =Bulletin No. 2=--An Investigation of the Iron Ore Resources of the North-west. By William Harrison Whittier. 1917. (Bureau of Industrial Research.) 128 pp. Price, 60 cents. =Bulletin No. 3=--An Industrial Survey of Seattle. By Curtis C. Aller. 1918. (Bureau of Industrial Research.) 64 pp. Price, 50 cents. =Bulletin No. 4=--A Summary of Mining and Metalliferous Mineral Resources in the State of Washington with Bibliography. By Arthur Homer Fischer. 1919. 124 pp. Price, 75 cents. =Bulletin No. 5=--Electrometallurgical and Electrochemical Industry in the State of Washington. By Charles Denham Grier. 1919. 43 pp. Price, 50 cents. =Bulletin No. 6=--Ornamental Concrete Lamp Posts. By Carl Edward Magnusson. 1919. 24 pp. Price, 40 cents. =Bulletin No. 7=--Multiplex Radio Telegraphy and Telephony. 1920. By F. M. Ryan, J. R. Tolmie, R. O. Bach. Price, 50 cents. =Bulletin No. 8=--Voltage Wave Analysis with Indicating Instruments. By Leslie Forrest Curtis. 1920. 28 pp. Price, 50 cents. =Bulletin No. 9=--The Coking Industry of the Pacific Northwest. By Joseph Daniels. 1920. 36 pp. Price, 60 cents. =Bulletin No. 10=--An Investigation of Compressed Spruce Pulleys. By George Samuel Wilson. 1920. 72 pp. Price, 80 cents.