Bollettino dell'Osservatorio della Regia Università di Torino, 1879 (vol. 14)
This is a bulletin of meteorological observations for January 1879 issued by the Royal University of Turin's observatory, a scientific periodical for specialist readers rather than a general publication. Its pictures are printed chart plates of hand-ruled line graphs tracing barometric pressure, temperature, vapour tension and relative humidity across the days of the month, in black ink on cream paper with dense grid lines. A designer could take their clean rhythmic wave patterns and tabular grids as a source for abstract linework, data-visualisation motifs or textured backgrounds.
