Some 9000 individuals were engaged in unclassified industries.
The rest of the island is mainly devoted to agriculture.
In connexion with the problem of universals, he held that the diversity of individuals depends on the quantitative division of matter (materia signata), and in this way he attracted the criticism of the Scotists, who pointed out that this very matter is individual and determinate, and, therefore, itself requires explanation.
Mendelssohn asserted the pragmatic principle of the possible plurality of truths: that just as various nations need different constitutions - to one a monarchy, to another a republic, may be the most congenial to the national genius - so individuals may need different religions.
The so-called Celtic type, exemplified by individuals of rather less than average height, brown-haired and brachycephalic, is the fundamental element in the nation and peoples the region between the Seine and the Garonne; in southern France a different type, dolichocephalic, short and with black hair and eyes, predominates.