A New Implement of War.Major N. Willoughby Wallace, of tbo King's lioyal Uifles, has invented a spade to meet the requirements of thauthorities—first, that it shall rendimen independent of any grouud; secondly, that it shall cut roots; thirdly, that it shall be able to lever up stones; fourthly, that is shall be useful in camp life, and, if necessary, be capable of breaking open boxes of ammunition or provisions; fifthly, that it shall be able to loophole a wall; and, sixthly, that is shall combinelightness and durability. The tool may be described gcuerally as a small piek-head, about seven inches long, formed bynrnmrimr which surrounds a woodenJcrutch head, and is securely fastened by rivets and screws both to the crutch and to the handle, which are ash. One cudis a pick,the other a grubber, both of solid steel. The blade is a peculiar shape,... . Mlflat at the bottom lor cutting purposes, and hollow in the upper portion. A protection guards the kuuckles and forms a fulcrum when the tool is beiug usedas a lever. The length over all is twenty-three inches, uud the weight is only two and one-quarter pourds. The tool is also socciallv useful for military miningpurposes, when men have to work with spade and in confined spaces; and it would be a very formidable weapon of defense at close quarters.