Meeting of the National Academy of Sciences in the Mineral Hall, West Wing, Smithsonian Institution Building, "Castle," April 1874. Joseph Henry, the first Secretary of the Smithsonian (1846-1878) is seated at the head of the room behind a small table. The rest of the participants are seated around the room. Several maps are arranged around Henry and there are mineralogy specimens visible in their exhibit cases against the walls of the room. There are a total of 48 people present at the meeting. Although Mary Henry is the only woman identified at the meeting, there are five other women present as well. Those identified are as follows: 1. Joseph Henry, presiding, 2. Mary Henry, 3. William Jones Rhees, 4. Frank Wigglesworth Clarke, 5. J. S. Newberry, 6. J. C. Dalton, 7. J. E. Hilgard, 8. J. J. Woodward, 9. Peter Parker, 10. Alfred M. Mayer, 11. William Ferrel, 12. Benjamin Silliman, 13. C. E. Dutton, 14. Emil Bessels, 15. Arnold Guyot, 16. J. H. C. Coffin, 17. B. A. Gould, 18. Elias Loomis, 19. C. A. Schott, 20. George Engelmann, 21. Benjamin Pierce, 22. Simon Newcomb, 23. Lewis Henry Morgan, 24. A. A. Michelson, 25. J. S. Billings, 26. S. Wier Mitchell, 27. F. M. Endlich. Simon Newcomb (#22) has a full beard and is the gentleman sitting directly in front of Benjamin Silliman (#12), April 1874, by Unknown, photographic print, courtesy Smithsonian Institution Archives, Record Unit 95, Box 28, Folder: 22, MAH10844.