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to more and more California dealers and distributors. For year around supplies of dimension lumber and precision-trimmed studs, depend on D & R and these 4 Oregon and Washington mills:

Old Growth Fir Dimension fiom

F.S,P. Lumber Co,, Port Orford, Oregon

Hemlock Studs from Warrenton Lumber Co,, Warrenlon, Oregon

Hemlock Dimension from Westport Lumber Co,, Westport, Oregon

Douglas Fir Studs from Shepherd & Dasher Lumber Co., Longview, Wash,

Foresters Test Timber Systems

Realistic long-range studieso based on periodic commercial logging operations, are testing two distinct ideas in forest manage. ment on the University of California's Blodgett Experimental Forest in El Dorado county.

UC foresters have reserved a third of the 2,900.acre forest for testing an even-age management system, planned for a 5,G to 60-year rotation, and anottrer third for an all.age msnagement system, with selective cutting every five years.

How the two timber management systems will work in a west. ern Sierra mixed conifer stand was outlined last month to around I00 members of the Society of American Foresters, who held part oI their annual spring meeting on the forest.

The professional group's visit previewed a public tour of the forest on Saturday, June 27, the third annual Blodgett Forest Field Day. Forest land owners, private and commercial, and pro. fessional foresters will spend a day on the forest. The program will be built around the theme, "Continuous Production from the Forestr" and will cover aspects of forest growth, protection, and regeneration.

Dr. Rudolph F. Grah, professor of forestry on the University campus at Berkeley, told the S.A.F. members on their tour that long-term projects will include silvicultural studies, yield measurement, harvesting, and studies of financial returns from the two forest management systems.

In the forest area being run on an even-age management system, it is planned to have three commercial thinnings of the stand before the final harvest when the trees are around 60 years old.

'oWe hope that each thinning will cover the cost of thinningr" he said. o'And we hope to increase the total volume yield a third by thinning." It was said thinnings from the stand would have potential markets as poles and pulpwood.

At the end of the 50- to 60-year rotation, he said, the harvest would test established clear-cut logging practices and shelterwood-cutting, in which protecting trees are left standing to provide seed and shade for natural regeneration.

Fast, regular ocean shipments by barge from Southern Oregon and the Columbia River direct to Southern California.

Now, over 5,000,000 {eet of dimension lumber and studs monthly manufactured especially lor Southern California construction needs, Art Neth would appreciate an opportunity to tell you how you and your customers will benefit from using dependable D & R dimension and studs. You can reach him by calling TRiangle 8-2663 or STate 3-0544.

In the all-age management tracts, he said, it is hoped that wood growth can be increased to allow eventually an annual cut of 1500 board feet per acre. Present condition of the forest, which has grown up largely untouched since clear-cut logging around l9fi) to 1910, allows an annual cut of no more than 800 board feet, he reported.

Nondestructive Testing Meet

Technical leaders of the major forest products industries spelled out their needs for nondestructive testing methods at a recent symposium on the subject at the I-1.S. Forest Products Laboratory in Wisconsin.

The meeting was a followup of one held last fall in cooperation with the National Lumber Manufacturers Association to discuss nondestructive testing processes in general with representatives of other industries. That symposium brought out various novel scientific tools for determining strength, density, moisture content, and other properties and characteristics of structural materials in general.

The latest symposium was designed to give industry representa. tives a chance to describe and discuss their needs for the benefit of scientists and engineers engaged in research in this type of testing. A number of universities doing research in forest products sent representatives.

Types of products foeussed on were trees and logs, structural lumber, poles and piling, laminated members, plywood and other wood-base panel products, and paper and paper products. Chairman was Robert L. Youngs, chief of the host Laboratory's division of solid wood products research.