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A 1579 Latin treatise on planispheres by Guidobaldo del Monte, published at Pisa by Girolamo Concordia, written for astronomers, mathematicians and instrument makers studying projections of the sphere. The pictures are geometric diagrams of spherical grids, with a circle crossed by meridians and parallels, labelled points and construction lines drawn in fine engraved strokes. A designer might take from them the clean radiating and curving grid structure of stereographic projection as a source for pattern, globe or orbit motifs.
