The Minnie ball.
--The destructive properties of the conical ball, or slug, fired from Minnie rifles, was made apparent at St. Louis during the recent disturbances at that place. The News says that some of the slugs, in striking the walls, tore bricks for a space of three or four inches in diameter, and, when they struck perpendicularly, penetrated to the depth of six inches into the colid wall. One shot, fired at an angle to the wall, tore away the corner of a brick next the door frame, struck the edge of the frame, penetrating through it at least six inches, and went through the door into the building, lodging in the opposite walls. Many of the balls struck the walls as high as the second story.
