History
- American Encyclopedia - Biography (203)
- A History of Aeronautics (192)
- The History of the Telephone (189)
- Dogs and All About Them (189)
- The Story of Alchemy and the Beginnings of Chemistry (180)
- Putnam's Word Book (178)
- American Encyclopedia - History, II (178)
- American Encyclopedia - Travel (174)
- A History of Science, IV - Modern Development of the Chemical and Biological Sciences (174)
- A History of Science, II - The Beginnings of Modern Science (173)
- William Penn (563)
- Hernando Cortez (553)
- George Gordon, Lord Byron (533)
- A (520)
- Overland Journey to India (519)
- Peter the Great (508)
- II. THE PROGRESS OF MODERN ASTRONOMY (503)
- Travels in Africa - Park Denham, Clapperton, Lander, and Others (498)
- Count Rumford (487)
- John Howard (481)
- A History of Aeronautics (1,400)
- American Encyclopedia - Biography (1,366)
- American Encyclopedia - History, I (1,323)
- The History of the Telephone (1,271)
- American Encyclopedia - Travel (1,255)
- Aeroplanes and Dirigibles of War (1,252)
- The Story of Alchemy and the Beginnings of Chemistry (1,240)
- American Encyclopedia - History, II (1,238)
- Putnam's Word Book (1,220)
- Dogs and All About Them (1,218)
- Hernando Cortez (5,125)
- William Penn (4,422)
- Count Rumford (4,298)
- Peter the Great (4,207)
- John Howard (4,143)
- Overland Journey to India (4,064)
- George Gordon, Lord Byron (4,053)
- War with Russia - Alliance of England, France and Turkey (4,049)
- Travels in Africa - Park Denham, Clapperton, Lander, and Others (3,883)
- II. THE PROGRESS OF MODERN ASTRONOMY (3,667)