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Gypsum wallboard craftsmen know the importance of Blue Diamond uniformity. Uniform characteristics aid in the fast production of smooth, ffre resistant walls and ceilings. Aniformity is a result of quality control.

Blue Diamond quality control begins with the grading of gypsum rock at the mines. It carries through every step of gypsum wallboard manufacture to the final placement of dunnage to safeguard its condition in transit.

Applicator craftsmanship and Blue Diamond uniformity ioin hands in producing smooth . soAd . . . fire resistant walls and ceilings.

Madison, Wis.Nine reports, covering subjects from the use of sandwich panels in building construction to efficient design of wood boxes, are included in the latest list of pu,blications released by the U. S. Forest Products Laboratory. Single copies of any report, either the six new or three revised ones, can be obtained by writing to the Director of the Laboratory, Madison 5, Wis. Report No. 2121 is "Sandwich Panels for Ruilding Construction," and box design data are given in "Nailed and Lock Corner Wood Boxes," Report No. 2129. Other new publications include "A Method of Calculating Internal Stresses in Drying Wood," Report No. 2133; "Chemical Research at the U. S. Forest Products Laboratory," Report No. 2134; "Some Properties of California White Oak and Oregon White Oak," Report No. 2735; and Report No.2125, "Hardboard from Red Alder and from a tr{ixture of SlowGrowth Southern Oaks." Revised reports are "Angelique," No. 7787 in the Foreign Woods series; "Effect of Long-Term Loading on Glass-Reinforced Plastic Laminates," No. 2039; and No. 68, "Factors that Influence the Decay of IJntreated Wood in Service and Comparative Decay Resistance of Diffelent Species."

"American Fence Products," a new illttstratecl general catalog listing fence and kindred products, also contains information and specifications on such other items as bale ties, corn cribs, hardware cloth, nails, r'oofing sheets, welded wire fabric, stone wire, trellises and agricultural wire rope. A unique chart and table takes the guesswork out of how much fence and how many posts are required to enclose farm acreage. Copies may be obtained from the Advertising Department, American Steel & Wire Division, U. S. Steel 'Corporation, Rockefeller Building, Cleveland 13, Ohio.

Two handy booklets describing all details of the two 1958 Research Houses built by the National Association of Home Builders will ,be available about May 1. Each contains some 35 illustrations along with technical information on the materials, equipment, and construction methods used. One booklet deals with the Research House at South Bend, Ind., the other with the one at Knoxville, Tenn. They may be obtained for $2 each by writing the Research Institute, National Association of Home Builders, 1625 L Street' N.W., Washington 6, D. C.

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