It would be a curious and interesting employment to estimate the number and character of these inventions, due wholly to the existing civil strife. Only then should we be able to form some adequate conception of the immense stimulus which has been applied to the national intellect, and which has caused it to embrace within the boundless range of its investigations, the highest moral and political problems, alike with the minutest questions of mechanical and economical convenience. But we should be greatly disappointed in not finding this phenomenon even partially comprehended by the powers that be. It is truly a melancholy thing to meet in the highest quarters so little sympathy with the noblest efforts of the popular mind, and to witness the cold neglect and even disdainful suspicion with which the most useful and valuable devices are often received, or rather, we should say, haughtily disregarded and rejected. Seldom or never do we find these inventions appreciated according to their merits. The Government is proverbially slow to adopt improvements of any kind; and the army and navy, like all similar professional bodies, are averse to every important change, and wedded to the instruments and processes in the use of which they have been educated and trained. This peculiar indisposition to progressive movements, in all the established institutions and organizations of society, has frequently been the subject of remark and of regret. It is, however, only an exaggeration of the conservative principle, which, when confined within proper limits, is wise and beneficial. Indeed, the actual progress of society in any period, is neither more nor less than the result of the conflict between the opposite tendencies, of retrogradation and advancement--a disposition to adhere to the old, which has been tried and approved, and a tendency toward the new, which, however promising and alluring, may yet disappoint and mislead. In the long run, however, the latter prevails, and the progressive movement, more or less rapid, goes on continually. Improvements gradually force themselves upon the attention of the most prejudiced minds, and eventually conquer opposition in spite of professional immobility and aversion to change. Observation has shown that the most important steps of progress usually originate outside of the professions, and are only adopted when they can no longer be resisted with safety to the conservative body. To the volunteer officer and soldier, or to those educated soldiers who have long been in civil life, will probably be due the greater part of that accessibility to new ideas which will result in important advances in the art of war. This assertion may seem to be paradoxical; but all experience proves that ignorance of old processes is most favorable to the introduction of new ones. And though in a thousand instances such ignorance may be disastrous, occasionally it finds the unprejudiced intellect illuminated by flashes of original