Another great improvement in warfare is a mirror or screen which is placed at the rear of heavy guns, reflecting everything in front. By means of certain mechanism the gun can be trained upon anything so reflected. This enables the gunners to keep out of danger in the bottom of their well and so live to a green old age. The advantage to them is considerable and too obvious to require exposition to anyone but an agnostic; but whether in the long run their country will find any profit in preserving the lives of men who are afraid to die for it—that is another matter. It might be better to incur the expense entailed by having relays of men to be killed in battle than to try to win battles with men who know nothing of the spirit, enthusiasm and heroism that come of peril. All mechanical devices tend to make cowards of those whom they protect. Men long accustomed to the security of even such slight earthworks as are thrown up by armies operating against each other in the open country lose something out of their general efficiency. The particular thing that they lose is courage. In long sieges the sallies and assaults are commonly feeble, spiritless affairs, easily repelled. So manifestly does a soldier’s comparative safety indispose him to incur even such perils as beset him in it that during the last years of our civil war, when it was customary for armies in the field to cover their fronts with breastworks, many intelligent officers, conceding the need of some protection, yet made their works much slighter than was easily possible. Except when the firing was heavy, close and continuous, “head-logs” (for example) for the men to fire under were distinctly demoralizing. The soldier who has least security is least reluctant to forego what security he has. That is to say, he is the bravest. Right sensibly General Miles once tried to call a halt in the progress of military extravagance by condemning our enormous expenditures for “disappearing guns.” The delicate and complicated mechanism for pointing and lowering the gun will break down when it is in action and deteriorate like a fish on the beach when it is not. During the long decades of peace it will need expert attention, exercise enough to wear it out, and constant renewal of its parts. The only merit of these absurd Jack-in-the-box guns is their bankrupting cost. If we can fool less wealthy nations into adopting them we shall have whatever advantage accrues to the longest purse in a contest of purses. So far, all other nations, rich and poor alike, have shown a thrifty indisposition to engage in the peaceful strife.