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Civil Architecture includes a number of didactic sheets outlining visual models for technical draftsmanship. This page offers instructions for creating volume and using light and shadow to define complex three-dimensional objects, like armillary spheres and terrestrial globes. The caption at bottom, “Globe of the Earth, or a framework of a dome,” reflects the wide range of subjects encompassed by Lequeu’s guidelines.
Jean-Jacques Lequeu (1757–1826)
Study of Spheres, from Civil Architecture,
Pen and black ink, gray wash
Bibliothèque nationale de France, Departement des Estampes et de la photographie