out the concomitance of great more resemble those that now expense, it is no longer pos- constitute the defenses of our sible for him to construct frontiers than the latter re- walls eapable of resisting the power of these new methods of attack. At the same time, he has found The neo-modern fort,… … ther earth nor masonry, what resource remains to him ? two—each armed with two guns of large caliber ; at the Fig. 1.—BIRD’S “EYE VIEW OF THE’ PLAN OF THE It has been many times observed that progress circumference, four small disappearing turrets, each SUBTERRANEAN FORT. makes its way in a…
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