26 LABORATORY PORCELAIN WARE CONSISTING OF REFRACTORY TUBES AND VESSELS, SAMPLING TUBES, PYROMETER TUBES, COMBUSTION TUBES, CRUCIBLES, COMBUSTION BOATS, EVAPORATING DISHES, CASSEROLES, AND CHEMICAL PORCELAIN WARE
APPLICANT DISCLAIMS THE WORDS "SILLIMANITE" AND "MULLITE" APART FROM THE MARK AS SHOWN.