Unique piece - "The History of Sanitation" ; "Things I Didn't Know About Brass ; condenser tubes ; Duronze - high strength silicon bronzes ; water pipe sizes for plumbing fixtures, branches, risers and mains ; bronze welding alloys ; furnace equipment and pickling machines ; sheet brass ; phono - electric supplies for trolley cars and street railway service ; tire pumps ; originators of electric furnace brass ; copper alloys ; Warco radiator air valves ; plumbing brass goods and heating specialties ; etc.