SECTION 1 INTRODUCTION For over half a century, Bestwall gypsum building materials have been accepted as a standard of quality everywhere.

PLAINTIFF'S EXHIBIT * GEORGIA-PACI F I C Fire-Block Gypsumboard COMBUSTIBLE ROOFING Plywood Sheathed Roof over G-P Fire-Block Gypsumboard COMBUSTIBLE Fire-Block Gypsumboard has been developed for application under roof coverings to act as a "Block" against fire.

GeorgiaPacific Gypsum Division, Portland, Oregon 97204 % *r>* 1'1 <OD E/*\ ,, V- ' CO CD <-- cn M .

PRtN^CMN USA.

Air Conditioning Thermal Units Manufacturing Company 64 East 25th Street, Chicago, HI.

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2226ex DX(G-P)-65 Georgia-ffecific 20% 19% GYPSUM WALLBOARD Percent of Industry Sales Ybarly Average 1965-1973 ^ I I I-------- i \ .niBIX 2227ex DX(G-P)-66 _____ Georgia-Ffecific 20% 19% 18% GYPSUMWU1BQARD Percent of Industry Sales 1966 17% 16% 15% 14% 13% 12% 11% 10% Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec SGP 0023982 exhibit G-P _ C C \ 2228ex DX(G-P)-67 GYPSUM WALLBQARD iSlA Percent of Industry Sales 1967GeorgiaFfecific |20.9 10% Dec Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec t-XHIBtf; i-P JsJ- SGP 0023983 2229ex DX(G-P)-68 Georgia-Ffecific 20% 19% 18% 17% 16% 15% 14% 13% 12% GYPSUM WALLBOARO Percent of Industry Seles 1968 11% 10% Oec Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec SGP 0023984 EXHIBIT .

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Specialties, Heating GRINNELL COMPANY.

CAUTION CONTAINS AS8F.ST0S FIBRES AVOIO CREATING OUST BREATHING ASBESTOS OUST MAY CAUSE SERIOUS BODILY HARM.

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Pipe and Tube (Steel) Jones & Laughlin Steel Corporation AMERICAN IRON AND STEEL WORKS Jones & Laughlin Building, Pittsburgh, Pa.

Stokers Iron Fireman Manufacturing Company Automatic Coal Burners Portland, Oregon Factories: Portland, Ore.; Cleveland, Ohio; Toronto, Canada Retail Branches or Subsidiaries Chicago, III.; Milwaukee, Wis.; St.