VERMICULITE PRODUCTS FOR BUILDING CONSTRUCTION PURPOSES-NAMELY, ACOUSTICAL VERMICULITE PLASTER; VERMICULITE FIREPROOFING PLASTER FOR STEEL DECKS AND BEAMS; VERMICULITE THERMAL INSULATING PLASTERS FOR STEEL BUILDINGS, STEAM BOILERS, OIL TANKS, AND THE LIKE; VERMICULITE CEILING FINISHES THAT ARE SPRAYED ON GYPSUM WALLBOARD, GYPSUM PLASTER, AND CONCRETE; AND VERMICULITE AGGREGATES FOR INCORPORATION IN PLASTER AND CONCRETE