Discussion on “electrochemical industries and their interest in the development of water powers” (Addicks), “water power development and the food problem” (Cushman), “relation of water power to transportation” (St

David B. Rushmore: As we all know, the world in its advance has been marked by certain definite epochs which have been associated more or less with certain inventions. Unfortunately, not all of these have been recorded in the United States Patent Office, because when man invented power and the use of powder, and the use of fire, the Patent Office was not organized.