42 DESIGN AND TESTING OF NEW PRODUCTS FOR OTHERS, WITH THE EXCEPTION OF VIBRATORY TUMBLERS, LAPIDARY SAWS, LAPIDARY SAW BLADES, ELECTRIC GEM FACETERS, LAMP STANDS AND REPLACEMENT LAMP BULBS; PRODUCT DEVELOPMENT SERVICES RENDERED TO OTHERS, BUT EXCLUDING THE DEVELOPMENT OF VIBRATORY TUMBLERS, LAPIDARY SAWS, LAPIDARY SAW BLADES, ELECTRIC GEM FACETERS, LAMP STANDS AND REPLACEMENT LAMP BULBS; AND ENGINEERING SERVICES, BUT EXCLUDING ENGINEERING SERVICES DIRECTED TO VIBRATORY TUMBLERS, LAPIDARY SAWS, LAPIDARY SAW BLADES, ELECTRIC GEM FACETERS, LAMP STANDS AND REPLACEMENT LAMP BULBS