| | Routh, Edward John, 1831-... | The elementary part of a treatise on the... | 1891 | | 3 bibl. |
| | Everett, J. D. | Illustrations of the C.G.S. system of un... | 1891 | | 2 bibl. |
| | La Baume Pluvinel, Aymar ... | La photographie au gélatino-bromure d'ar... | 1891 | | 1 bibl. |
| | Berget, Alphonse, 1860-19... | Photographie des couleurs par la méthode... | | | 1 bibl. |
| | Jamin, Jules Célestin | Cours de physique de l'école polytechniq... | 1891 | | 1 bibl. |
| | Kirchhoff, Gustav | Gesammelte Abhandlungen. Nachtrag / von ... | 1891 | | 2 bibl. |
| | Wöhler, Friedrich | Untersuchungen über das Radikal der Benz... | 1891 | | 2 bibl. |
| | Eder, Josef Maria, 1855-1... | Die Chemischen Wirkungen des Lichtes und... | 1891 | | 1 bibl. |
| | Eder, Josef Maria, 1855-1... | Die Chemischen Wirkungen des Lichtes (Ph... | 1891 | | 2 bibl. |
| | Eder, Josef Maria, 1855-1... | Geschichte der Photochemie und Photogaph... | 1891 | | 2 bibl. |