It would not do, however, to confine one's attention solely to Chromol steel in making a systematic study of the question of the best high-alloy of steel for bridgework, because the preceding study has been made upon data some of which, of necessity, are so roughly approximate that the findings therefrom have to be taken cum grano salis. All that can properly be claimed for this tentative investigation is that it will serve as an indication that an exhaustive series of tests on molybdenum steel for bridges would be well worth while, and that it suggests about what might be expected as a result thereof.