Arabic Machine Manuscript

Images from an Arabic manuscript featuring schematics for water powered systems, pulleys and gearing mechanisms. The date is unknown but is thought to be from somet…more

Fortification Theory (1600)

Images from Jean Errard’s Fortification Réduicte Art and Démonstrée (Paris, 1600), a seminal work in fortification theory. Errard (1554-1610) was a mathematici…more

Illustrations of Ventilation (1869)

Illustrations showing movement of air through various rooms, from Lectures on Ventilation (1869) by Lewis W. Leeds. The full book can be seen here on Internet Archi…more