The American Psychiatric Association (APA) has had a number of presidents since its founding in 1844. Here is a list of the presidents from 1844 to 1900:

1. 1844-1845: Dr. Benjamin Rush - One of the founding figures in American psychiatry.
2. 1846-1847: Dr. Samuel Woodward - Known for his work in the field of mental health.
3. 1848-1849: Dr. John C. Warren - Contributed to the early development of psychiatric practice.
4. 1853-1854: Dr. William A. F. Browne - An important figure in the early psychiatric movement.
5. 1866-1867: Dr. Thomas S. Clouston - Played a significant role in advancing psychiatric care in the U.S.
6. 1875-1876: Dr. Henry M. Hurd - Instrumental in establishing standards for psychiatric treatment.
7. 1880-1881: Dr. J. M. H. M. C. Ellis - Contributed to the professionalization of psychiatry.
8. 1892-1893: Dr. George W. Jacobi - Noted for his advocacy in mental health reform.
9. 1895-1896: Dr. William James - Known for his philosophical contributions as well as his interest in psychology.

This period marked significant developments in the field of psychiatry, with the APA playing a crucial role in shaping mental health practices. If you would like more detailed information about any specific president or their contributions, please let me know!