Thomas Curtis Clarke & others
Dionysius Lardner
George Iles
Robert H. Thurston
Georgius Agricola (tr. Herbert & Lou Henry Hoover)
T. O'Conor Sloane
Babcock & Wilcox Company
Vitruvius (tr. Morris Hicky Morgan)
Robert Stevenson
Henry H. Cunynghame
Leonardo da Vinci
