- Cyon, Moses, author3
- Du Bois-Reymond, Emil, 1818-18963
- Gysi, Alfred, 1865-1957, illustrator3
- Key, Axel, 1832-19013
- Rosenthal, Richard S., author3
- Schapringer, A. (Alois), author3
- Seerig, Albert Wilhelm Hermann, 1797?-1862, Author3
- Tarkhanov, I. R. (Ivan Romanovich), 1846-1908, author3
- Voettiner, Hermann.3
- Yount, Silas T., author3
- Bernstein, Julius, 1839-1917, author2
- Bock, Carl Ernst, 1809-18742
- Cyon, Elie de, 1843-19122
- Dähnhardt, C., author2
- Donders, F. C. (Franciscus Cornelis), 1818-1889, author2
- Dr. Miles Medical Co., author.2
- Einhorn, Max, 1862-1953, author2
- Haeckel, Ernst Heinrich Philipp August, 1834-1919, author2
- Heinen, Henry.2
- Hering, Constantine, 1800-18802