He has very evidently more originality than judgment, and it is hardly probable that his system will ever be generally adopted in practice.
The Metz system, as arranged by Noizet, as a theoretical study, is undoubtedly the very best that is now known.

It, however, requires great modifications to suit it to different localities.

For a horizontal site, it is probably the most perfect system ever devised.

It is based on the system of Vauban as improved by Cormontaigne, and contains several of the modifications suggested by modern engineers.

It is applied in a modified form to the new fortifications of Paris.
Baron Rohault de Fleury has introduced many modifications of the ordinary French system in his new defences of Lyons.