Proserpina ; also, Ariadne florentina ; The opening of the Crystal Palace ; St. Mark's rest ; Lectures on art ; The elements of perspective
A late nineteenth-century Boston compilation by John Ruskin gathering several of his writings, including lectures on art and a treatise on perspective, aimed at general readers and students of drawing. The pictures are plain line diagrams of perspective constructions: lettered vanishing points, receding floor lines, and horizon guides that show how a designer might build depth from a single point.
