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Authors
- Haskell, Benjamin, 1810-1878, author1
- Haynes, W. H., author1
- Heath, Christopher, 1835-1905 author1
- Hefflefinger, M. L. (Marion L.), 1866-1910 author1
- Hektoen, Ludvig, 1863-19513
- Helmholtz, Hermann von, 1821-18941
- Helmholtz, Hermann von, 1821-1894 author1
- Helmuth, William S.1
- Helmuth, William Tod, 1833-1902 author1
- Hempel, Charles J. (Charles Julius), 1811-1879 author1
- Henderson, Thomas, 1789-18541
- Henrotin, Fernand, 1847-19062
- Henry, Frederick P. (Frederick Porteous), 1844-1919 author3
- Hering, Constantine, 1800-18801
- Herrick, James B. (James Bryan), 1861-19542
- Hickman, C. W. (Charles W.) author1
- Hill, Lewis Webb, 1889-1968 author1
- Hill, Reuben.1
- Hinsdale, Guy, 1858-1948 author1
- Hinsdale, Guy, 1858-1948, author2