A study of the great facts of our national possibilities that have been gathered together in this book should arouse in the heart of every American, old and young, the feeling that here is a work for every hand and every brain, not only to save, but to use wisely; to develop all the possibilities of our great resources no less than to conserve them. In searching for new by-products or machinery for checking the waste and adding to the usefulness of these resources there is a field for invention that will not only bring wealth to the inventor, but prosperity and length of life to the nation. THE END End of Project Gutenberg's Checking the Waste, by Mary Huston Gregory