"The Great Fifteen."

1. The Cotton Gin, Eli Whitney, 1793.

2. The Steamboat, Robert Fulton, 1807.

3. The Sewing Machine, Elias Howe, 1841.

4. The Telegraph, Samuel F. B. Morse, 1832.

5. Vulcanized Rubber, Charles Goodyear, 1843.

6. The Reaper, Cyrus M'Cormick, 1834.

7. The Telephone, Alexander Graham Bell, 1875.

8. The Phonograph and similar process of reproducing light, sound and form. First phonograph invented by Leon Scott in 1857. The modern Phonograph by Thomas A. Edison in 1877. Similar inventions since that time, mainly by Edison.

9. The Electric Light, first by Sir Humphry Davy, in 1809. The Incandescent Light and modern Electric Light used for practical purposes, by Edison, 1880.

10. The Electric Motor, the symbol of Electric power in its many forms, the first by Jacobi in 1838. (Jacobi was born in Westphalia, but came to the United States in 1853 and spent the balance of his life here.) First Electric Railway built by Thomas Davenport, at Brandon, Vt., 1835. The wonderful growth of the electrical motor in the United States entitles it to be placed among American inventions.

11. The Perfecting Press, William Bullock, 1865. (Developed by R. Hoe & Co.)

12. Linotype (typesetting) Machine, Otto Mergenthaler, 1866.

13. The Typewriter, William Austin Burt, 1829. (Developed since 1870.)

14. The Power Threshing Machine (Traction Engine and Thresher combined), Ephraim, Alfred and Charles Howland, 1891.

15. Process of making Liquid Air, Charles E. Tripler, 1891.

There are a number of other inventions which seemed to belong to this classification, but upon examination were found to be of foreign invention. This list has been submitted to competent judges, authorities on the subject, and has been approved.