Bollettino dell'Osservatorio della Regia Università di Torino, 1880 (vol. 15)
This is a Turin observatory bulletin of 1880 issued by the Royal University's astronomical observatory, a scientific periodical of meteorological records for Italian readers and researchers. Its pictures are monthly charts of barometric, thermometric, vapour tension and relative humidity lines drawn as dense, ruled graph paper with hand-traced wavy curves, useful to a designer seeking scientific chart layouts, grid systems and data-line motifs.
