Such bodies of officers have been developed in navies in recent years, by a desire to take advantage of electrical appliances which greatly increase the accuracy and rapidity of communication over long distances. In days not long ago, before communication by radio was developed, commanders on the spot were in possession of much more information about events in their vicinity, compared with the Navy Department, than they are now; and the difficulties and uncertainties of communication made it necessary to leave much more to their discretion and initiative. The President of the United States can now by telephone talk to the commander-in-chief, when he is in home waters, and every day sees some improvement in this line. This facility of communication carries with it, of course, the danger of "interfering," one of the most frequent causes of trouble in the past, in conducting the operations of both armies and fleets--a danger very real, very insidious, and very important. The very ease with which interference can be made, the trained instinct of the subordinate to follow the wishes of his superior if he can, the temptation to the superior to wield personally some military power and get some military glory, conspire to bring about interference. This is only an illustration, however, of the well-known fact that every power can be used for evil as well as for good, and is not a valid argument against developing to the utmost the communication between the department and the fleet. It is, however, a very valid argument against developing it unless there be developed simultaneously some means like a "safety device" for preventing or at least discouraging its misuse. The means devised is the General Staff; and in some countries like Germany it seems to work so well that (unless our information is incorrect) the Emperor himself does not interfere. He gives the machine a certain problem to work out, and he accepts the answer as the answer which has a greater probability of being correct than any answer he could get by other means. _Training of the Staff_.--Now, if there is to be at the Navy Department a body of men who will work out and recommend what instructions should be given to the commander-in-chief, it seems obvious that that body of men should be thoroughly trained. In the German army the training of men to do this work (General Staff work) is given only to officers specially selected. Certain young officers who promise well are sent to the war college. Those who show aptitude and industry are then put tentatively into the General Staff. Those who show marked fitness in their tentative employment are then put into the General Staff, which is as truly a special corps as is our construction corps. How closely this system is followed with the General Staff in the German navy, the present writer does not know exactly; but his information is that the system in the navy is copied (though with certain modifications) after the system in the army.