The Great Fifteen

The fifteen great American inventions of world-wide adoption are: 1. The cotton gin. 2. The planting machine. 3. The grass mower and reaper. 4. The rotary printing press. 5. Navigation by steam. 6. Hot-air engine. 7. The sewing machine. 8. The India-rubber industry. 9. The machine manufacture of horseshoes. 10. The sand blast for carving. 11. The gauge lathe. 12. The grain elevator. 13. Artificial ice making on a large scale. 14. The electric magnet and its practical application. 15. The telephone.

While these are called "The Great Fifteen," many others might be added of later date--too recent, though, to have attained a world-wide adoption.