A History of Science
by Henry Smith Williams
Aircraft and Submarines
by Willis J. Abbot
The Book of Mars
by Samuel Glasstone
Earths In Our Solar System
by Emanuel Swedenborg
Henley's 20th Century Formulas
by Gardner D. Hiscox
Hydrogen Craft and Hot Air Balloons
by U.S. Military
Lost Journals of Nikola Tesla
by Tim Swartz
Marconi : The Man and His Wireless
by Orin E. Dunlap
Martyrs of Science
by Sir David Brewster
Old Time Makers of Medicine
by James J. Walsh
Perpetual Motion
by Percy Verance
Perpetuum Mobile - 300 Years of History
by Henry Dircks
Power Alcohol
by G. W. Monier-Williams
Search for the Universal Ancestors
by H. Hartman J.G. Lawless P. Morrison
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