1030-1089.
It remains to be seen how the conception of "usufruct" is to be imported into the relations of sovereign States, and, more especially, what are to be the relations of the usufructuary to States other than the State under which he holds.

It is, of course, quite possible to adapt the terms of Roman private law to international use.

"Dominium," "Possessio," "Occupatio," have long been so adapted, but it has yet to be proved that "Usufructus" is equally malleable.

I can recall no other use of the term in international discussions than the somewhat rhetorical statement that an invader should consider himself as merely the "usufructuary" of the resources of the country which he is invading; which is no more than to say that he should use them "en bon pere de famille." It will be a very different matter to put a strict legal construction upon the grant of the "usufruct" of Port Arthur.

By way of homage to the conception of such a grant, as presumably creating at the outside a life-interest, Russia seems to have taken it, in the first instance, only for twenty-five years.