Rivista di astronomia e scienze affini, 1912, a. 6, n. 03 (March)
This Italian astronomy journal issue from 1912 was issued by the Società astronomica italiana and the Turin astrophysical observatory for a readership of astronomers and amateur observers. Its pictures are monochrome line diagrams: a rotated graph of curves with dashed lines and labelled points, a shaded perspective view of a sphere with a cone of shadow, a geometric construction of a circle with tangents and chords, and a labelled figure of intersecting curves, all useful to a designer seeking precise technical linework and schematic diagram styles.
