win39Dull's historic U.S. Amateur Four-Ball win39-year-old Marc Dull became the first golfer to win a U.S. Amateur FourWinokur 39J Potassium Nitrate - 51. Airfloat Charcoal - 19. Antimony Trisulphide - 12. Atomized Aluminum 120-325 mesh - 9. Barium Carbonate - 5. Dextrin