01{ E 1I O|JR TIRE RESISTA}|T GYPSUTI WATLBOARD

Now, with Blue Diamond ys" Fire Halt special core wallboard, applicator craftsmen have a ffne handling and ffnishing gypsum wallboard with a one hour fire resistioe roting.

Fire Halt may be used in institutional, commercial, indusbial, apartment and home construction-wherever high quality interiors combining great strengfh with increased fire resistance are desired or required by building codes.

Blue Diamond's Fire Halt data sheet will be sent you on request. It gives full information on how to use Fire Halt in one hour walls, partitions and ceilings, in accordance with Underwriters' Laboratories' fire resistive rating requirements.

To meet the growing demand for increased safety on streets and highways at night, and to enable a greater number of lights to be installed at lowest possible cost, a new 8-page brochtre, "Pressure Treated Wood Poles-for Street and Highway Lighting," has been issued and copies may be obtained without charge by writing to the Western Wood Preserving Operators Association, 1410 S. W. Morrison Street, Portland 5, Oregon.

SWW Co. Chipper knives available for every make and model of wood chipper, and highly resistant to chipping, cracking, warp- ing and abrasive wear, with pointers on storage, installation, maintenance and regrinding, are described in a new four-page, two-color bulletin. To obtain a free copy or get other specific information on wood chipping problems, write direct to Sales Promotion Dept., Simonds Worden White Company, 1l0l Negley Place, Dayton 7, Ohio.

Management must become more concerned with upgrading employes to assume positions of leadership if our free enterprise system is to survive, according to Clarence A. Weber and John W. Karnes, Jr., in their new book, "Industrial Leadership," which will be published by the Chilton Company, Philadelphia, on May 6.

Selected Bibliography on Building 'Construction and Maintenance, National Burearr of Standards Building Materials and Structures Report 140, Third Edition, by Edith R. tr{eggers, 30 pages, 30 cents (order fronr Government Printing Office, Superintendent of Documents, Washington 25, D. C.), gives sources of information concerning building construction and maintenance. Note: Foreign remittance must be in U. S. exchange and should include an additional one-fourth of the publication price to cover mailing costs.