ROUI{DS I.UilBER COMPANY

lion for conventional materials in these applications t'ithout appreciable loss in properties.

Another forward step toward use of the rvhole tree is occurring in the manufacture of containers, according to speakers in the Irackaging session. Lorv grade timbers formerly considered unprofitable to process are being used to make paper-overlaid veneer and other types of containers.

T. E. Batey, Jr., Douglas Fir Plyrvood Association engineer, described before a representative group of plyrvoocl manufacturers the phenomena occurring during face checking of veneers, long a tronblesome problem in the industry. He demonstrated that by close control over cutting ;'nd gluing operations, face checking could be measurably reduced. Discussion developed that the single most effective remedial step is in pre-heating the logs prior to cutting, a practice not crlrrently used in the softwood plywood industry. A promising development, headed for commercial application rvithin the next year, is electrical heating of logs. The developmental work thus far has beer-r performed by the U. S. Forest Products Laboratory, Madison, \Mis.

In another part of the session, Professor Fred Wangaard, veneer authority, Yale University, proposed simplification of tabulations for the various strength data required for standard plylvood constructions.

Obtaining the potential 100 million-ton annual wood residue resource will require low-cost harvesting and delivery methods. Logging and milling experts from a1l sections of the country took a long look at this problem.

stated that current logging of second-grow'th western softrvoods amounts to one-third of the l2-billion annual board Ioot log production in the Dougias fir region. Second gro'rvth is more expensive to harvest and seils at a lolver price than old growth. Horvever, techniques and machinery are being developed that are best adapted to this size timber. Use of horses and pneumatic tired vehicles on gentle topography sholv promise, as does a cable system on rough terrain. Also being studied are methocls of buirdling in the woods to reduce subsequent handling time.

In the east, hardwood logs suitable for veneer and lumber are separated in the woods operations. The present objective is sawing only No. 1 common or better, with "non-profit" grades and slabs and edgings from the sawmill chipped for use in pulp manufacture.

As evidence of progress in woodworking machinery, it rvas described how higher lumber yields could be obtained through blanking with the two-way thicknessing planer.

Present residues, in the form of sawdust or trimmings being burned for disposal, contribute to the smog, haze, and smoke problem of many communities, said E. S. Feldman, executive secretary of the Furniture Manufacturers Association of Southern California, and a recognized legal authority on the smog problem. He warned that all phases of the industry should be concerned 'ivith problems of air pollution.

Feldman stressed that the ultimate solution to wood industry contribtrtion to smog was not in finding ways and means of conveniently disposing of the waste through efficient burning, etc., but rather to develop