 Weiss wrote the "Geschichte Alfreds des Grossen" (Schaffhausen, 1852), careful but unoriginal; he also issued "Maria Theresa und der österreichische Erbfolgekrieg" (Vienna, 1863).His chief work is his summary of the history of the world in thirty-two volumes (last edition, Graz, 1900–06).It extends to the close of the Congress of Vienna and gives special attention to the eighteenth century and the French Revolution, both of which it treats exhaustively on the basis of contemporary literature.