He also published separately some juridical and physical theses, and a German translation of Memoires du philosophe de Merian.
Folk-right is the aggregate of rules, formulated or latent but susceptible of formulation, which can be appealed to as the expression of the juridical consciousness of the people at large or of the communities of which it is composed.
But with these reservations it must unhesitatingly be said that concordats are bilateral or synallagmatic contracts, from which results an equal mutual obligation for the two parties, who enter into a juridical engagement towards each other.
They have thus upheld the true contractual nature of concordats and the mutual juridical obligation which results from them.
In the 2nd and 3rd centuries, for administrative and juridical purposes, it was sometimes (with Lucania) joined to Apulia and Calabria.