Rivista di astronomia e scienze affini, 1912, a. 6, n. 05 (May)
This is an Italian astronomy periodical, the May 1912 issue of the Rivista di astronomia e scienze affini, issued by the Società astronomica italiana and the Turin astronomical observatory for a scholarly readership of astronomers. Its pictures are plain line diagrams on cream paper: a rotating apparatus with rods and pivots, and geometric sketches of light paths, star positions and vectors labelled with letters and compass directions such as East and West, which a designer could borrow for technical or scientific linework.
