Arbeitschule: Krummlinige Figuren: Für Kinder von 7 bis 12 Jahren
A German drawing-instruction book titled Arbeitschule: Krummlinige Figuren, compiled by Friedrich Seidel and Franz Schmidt in 1865 for children aged seven to twelve, held by Heidelberg University Library. Its plates are ruled-grid sheets of curved outline objects drawn in pencil and ink, such as goblets, ewers, shields, a butterfly, a guitar, scissors, crowns and crossed weapons, each set as a simple contour for copying.
