Another paper of great practical moment was read before Section C by Prof. H. W. Wiley, chemist to the United States Department of Agriculture, and Mr. H. W. Krug, on New Products from Maize Stalks. Careful analyses of the pith and stalks of corn, and important suggestions as to their great utility in various ways, were presented. Some of these were very surprising, not only pointing out the value of these substances as fodder, when properly prepared and used, but in the realm of war as well as in peace, for protecting the sides of naval vessels as a light and most effective armor, and in the manufacture of smokeless powder of a superior quality. Professor Wiley claimed that from these hitherto almost waste products of American farms immense results may be obtained. Very naturally, the recent war and questions connected with it called forth some striking contributions. Prof. William S. Aldrich, of the University of Illinois, addressed Section D and a large proportion of members from other sections on Engineering Experiences with Spanish Wrecks, and the story of the Maria Teresa. Professor Aldrich was connected with the United States repair-ship Vulcan, and described the remarkable character of that vessel--an entire novelty in naval warfare--with her complete outfit of engineering tools and machinery, even to brass and iron furnaces of large capacity. Never before, he said, had such castings been made on board ship, or a foundry operated on the ocean. The effects of the American rapid-fire guns on Admiral Cervera's ships were fully described and illustrated, and the paper closed with a vivid and detailed account of the floating of the Maria Teresa, her repairing by the crew of the Vulcan through five weeks of most difficult work, and the unsuccessful attempt to bring her to Norfolk, ending in her abandonment and loss. The public lecture of Wednesday evening was by Prof. C. E. Monroe, of Washington, D. C., on the Application of Modern Explosives, very fully illustrated. Detailed accounts were given of the manufacture of gun cotton and various recent forms of high explosives and smokeless powders. In regard to the use of the latter, Professor Monroe emphasized the fact that France and Germany had adopted smokeless powders in 1887, and Italy and England a year or two later, and characterized as "unpardonable" the fact that our own service was unprovided with any such material when we began the war with Spain. He further discussed recent and very important experiments in the matter of throwing from ordinary guns shells charged with high explosives, especially that known as Joveite, with which tremendous effects have been produced in penetrating the heaviest plating.