Authors
- The Dominion of the Air - The Story of Aerial Navigation
- The Story of Alchemy and the Beginnings of Chemistry
- Putnam's Word Book
- A History of Science, III - Modern Development of the Physical Sciences
- A History of Science, IV - Modern Development of the Chemical and Biological Sciences
- Stories of Inventors
- Dogs and All About Them
- A History of Science, I - The Beginnings of Science
- A History of Science, II - The Beginnings of Modern Science
- International Finance
- Napoleon, Emperor
- CHAPTER III. THE FIRST BALLOON ASCENT IN ENGLAND.
- The War of American Independence
- Hernando Cortez
- Count Rumford
- CHAPTER XXII. The Aeroplane Engine
- CHAPTER XLIX. PRACTICAL MANAGEMENT
- GOLD EXPORTS AND IMPORTS
- Travels in Africa - Park Denham, Clapperton, Lander, and Others
- V. THE HORIZONTALLY-OPPOSED ENGINE
- American Encyclopedia - Biography
- American Encyclopedia - Travel
- Aeroplanes and Dirigibles of War
- Dogs and All About Them
- A History of Aeronautics
- Putnam's Word Book
- The History of the Telephone
- American Encyclopedia - History, I
- American Encyclopedia - History, II
- The Story of Alchemy and the Beginnings of Chemistry
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