Rivista di astronomia e scienze affini, 1912, a. 6, n. 11 (November)
An Italian astronomy journal issue from November 1912, published by the Società astronomica italiana with the Turin Observatory, written for astronomers and scientific readers. Its pages carry geometric diagrams of sight lines, a sphere with a tangent line, and crossed triangles, drawn in plain black line with lettered points for explaining parallax and observation geometry. A designer could take from them the clean, labelled line-diagram style of early twentieth-century technical print.
