Samuel Morse and the Electronic Age by Wilma Pitchford Hays, Immortals of Engineering
Isaac Newton: Mastermind of Modern Science by David C Knight, Vintage 1961
Robert Boyle: Founder of Modern Chemistry by Harry Sootin, Immortals of Science
Marco Polo: The Great Traveler by Robert N Webb, Immortals of History, Vintage 1967
Alessandro Volta and the Electric Battery, Bern Dibner, Immortals of Science, 1964
