His later years were occupied with a series of philosophical works, of which the most important were: Die Phantasie als Grundprincip des Weltprocesses (1877), Uber die Genesis der Menschheit and deren geistige Entwicklung in Religion, Sittlichkeit and Sprache (1883), and Ober die Organisation and Cultur der menschlichen Gesellschaft (1885).
Wiedemann, Agyptische Geschichte (Gotha, 1884); articles by Mahler and others in the Zeitschrift fr agyptische Sprache and Orientaiistische Literaturzeitung (recent years).
C. Madan, An Outline Dictionary intended as an Aid to the Study of the Languages of the Bantu and other Uncivilized Races (1905); C. Meinhof, Die Sprache der Herero, a grammar and vocabulary (Berlin, 1909); G.
See Sir Samuel Baker, The Albert N'yanza (London, 1866); Friedrich Muller, Die Sprache der Bari (Vienna, 2864); G.
Next followed, in the Zeitschrift fr gyptische Sprache und Alterlhumskunde, studies on the Old Kingdom inscription of Una, and the Middle Kingdom contracts of Assiut, as well as on an Old Coptic text of the 3rd century AD.
Lehmann, Forschungen fiber Lessings Sprache (1875); W.
Among his numerous publications were A Missionary Gazetteer (1832), A Biography of Self-Taught Men (1832), a once widely known Eclectic Reader (1835), a translation, with Samuel Harvey Taylor (1807-1871), of Kiihner's Schulgrammatik der Griechischen Sprache and Classical Studies (1844), essays in ancient literature and art written in collaboration with Barnas Sears and C. C. Felton.
At this point a papyrus of stories written in the popular language of the Middle Kingdom provided Erman with a stepping-stone from Old Egyptian to the Late Egyptian of the Neuagyptische Grammatik, and gave the connections that would bind solidly together the whole structtire of Egyptian grammar (see Sprache des Papyrus Westcar, 1889).
Mention should also be made of: Handworterbuch der lateinischen Sprache (5th ed., 1874); Romische Litteraturgeschichte (1847), of which only the introductory volume appeared; an edition of the treatise De Graecae linguae particulis (1835-1842) of Matthaeus Deverius (Devares), a learned Corfiote (c. 1500-1570), and corrector of the Greek MSS.
Schmidt published his Grammatik der tibetischen Sprache in 1839 and his Tibetisch-deutsches Worterbuch in 1841, but neither of these works justified the great pretensions of the author, whose access to Mongolian sources had enabled him to enrich the results of his labours with a certain amount of information unknown to his predecessors.