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1. 1922 November 21, President Frank Aydelotte, Swarthmore, Pennsylvania 1922 November 21, President Frank Aydelotte, Swarthmore, Pennsylvania Eclipses; Solar eclipses; Mexico Correspondence

2. 1923 April, Swarthmore College, Swarthmore, Pennsylvania 1923 April, Swarthmore College, Swarthmore, Pennsylvania Mexico; Solar eclipses; Swarthmore College. Astronomy Department; List

3. 1923 December 19, to George Brooke, Philadelphia 1923 December 19, to George Brooke, Philadelphia Mexico; Solar eclipses; Eclipses; Correspondence

4. 1923 July 13, Swarthmore Pa (?), to Wilson M. Powell, New York - Letter from John A. Miller(?) 1923 July 13, Swarthmore Pa (?), to Wilson M. Powell, New York - Letter from John A. Miller(?) Eclipses; Mexico; Swarthmore College. Astronomy Department Letter to Wilson M. Powell from John A. Miller(?)

5. 1923 July 31 1923 July 31 Mexico; Solar eclipses; Swarthmore College. Astronomy Department; Cash account of H.D. Curtis and the Sproul Expedition

6. 1923 June 26, United States Custom Service form 1923 June 26, United States Custom Service form Eclipses; Mexico Application to ship items to Mexico

7. 1923 September 10 1923 September 10 Eclipses; Mexico; Solar eclipses; Swarthmore College. Astronomy Department; Photograph - Yerbanis, Mexico

8. 1923 September 10 1923 September 10 Eclipses; Mexico; Solar eclipses; Swarthmore College. Astronomy Department; Photograph - Yerbanis, Mexico

9. 1923 September 10 1923 September 10 Eclipses; Mexico; Solar eclipses; Swarthmore College. Astronomy Department; Photograph - Pasaje, Durango, Mexico

10. 1923 September 10 1923 September 10 Eclipses; Mexico; Solar eclipses; Swarthmore College. Astronomy Department; Photograph - Pasaje, Durango, Mexico

11. 1923 September 10 1923 September 10 Three-page document about the Sproul Observatory Expedition to Mexico

12. 1923 September 10, Mexico Eclipse 1923 September 10, Mexico Eclipse Eclipses; Mexico Photograph

13. 1923, Mexico eclipse 1923, Mexico eclipse Eclipses; Mexico Photograph

14. 1923, Mexico eclipse 1923, Mexico eclipse Eclipses; Mexico Photograph

15. 1923, Mexico eclipse 1923, Mexico eclipse Eclipses; Mexico Photograph

16. 1924 February 5, to George H. Peters, Washington, D. C. 1924 February 5, to George H. Peters, Washington, D. C. Correspondence

17. 1924 February 5, to George H. Peters, Washington, D.C. 1924 February 5, to George H. Peters, Washington, D.C. Mexico; Solar eclipses; Swarthmore College. Astronomy Department; Correspondence

18. 1925 Jan. 1 1925 Jan. 1 Abstract: Motion in the sun's atmosphere

19. Building the great tower Building the great tower Eclipses; Mexico; Solar eclipses; Swarthmore College. Astronomy Department; Photograph

20. Day of the eclipse Day of the eclipse Eclipses; Mexico; Solar eclipses; Swarthmore College. Astronomy Department; Photograph
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