- A History of Science, II - The Beginnings of Modern Science
- A History of Science, III - Modern Development of the Physical Sciences
- Aeroplanes and Dirigibles of War
- A History of Science, IV - Modern Development of the Chemical and Biological Sciences
- A History of Science, I - The Beginnings of Science
- Stories of Inventors
- The History of the Telephone
- American Encyclopedia - Biography
- American Encyclopedia - History, II
- The Dominion of the Air - The Story of Aerial Navigation