Over in the invention department tests of all kinds were being continually conducted. With his keen gray eyes looking well to the future, Colonel Wiljohn was willing to try out in his laboratories things which to more conservative men seemed mere schemes and addle-pated ideas. If a scheme failed in the testing, it was just another visionary mechanism to be set aside. If one idea out of ten, out of a hundred even, proved to have worth, aviation had made a forward step!