Annalen der Physik [und Chemie] Backfile
A backfile of Annalen der Physik [und Chemie] is available on Gallica. Presently, the following years are available: 1799 - 1885, 1897 - 1921, 1924 - 1930, and 1935 - 1938. Gallica is a digitized collection of resources available from Bibliothèque Nationale de France.