Contrast WitS Old Tactics.Everything about the maneuvers emphasized the contrast with those of the far away days when the marching hosts passed through the National Capital at the close4 of the civil war. Yesterday’s review and intricate drills set Immediately to follow showed the latest skill arid horsemanship resulting from practice since midsummer In the Shenandoah valley of a program of cavalry exercises formulated by a poard which within a year returned from Europe, where the cavalry systems of Germany, France, Italy» and England were carefully studied with a view to adapting all that goes to make greatest efficiency to the needs of the cavalry arm of Uncle Sam’s defenses.With the review over, the maneuvers Immediately followed. The tests were made In trOop, squadron, regimental, and brigade formation. One feature of the new cavalry system was the drills without bugle calls or shouted commands. Save the clatter of the horses’ ’ feet absolute silence prevailed.# With the minor formation maneuvers executed, came the cllmx in the brigade charge, at the conclusion of which the troops rode back to their camp at Fort Myer.Witnessed by 50,000.The ^principal evolutions took place in the open space northwest of the TJdal basin, the course covered extending on the east to Seventeenth street and on the north and west to near the edge of the park. The President's reviewing stand was set tip well in from the speedway, and faced north toward the open ground.It fs estimated that a crowd of 50,000 people turned out to see the maneuvers They rimmed the Tidal basin many rows deep from the foot of Seventeenth street to the bridge* and extended on the other side of the drill grounds aa far as the foot of Twenty-first street. Behind the packed ranks of those on foot were numerous automobiles pra.cU call y fillingthe roadway along the entire line.