Combinations of colours and uncoloured light [microform]
A 1904 Toronto university library publication by Susannah Amelia Chown on colour theory, catalogued as a microform, for students and readers of optics and colour study. The one picture is a plain black-on-white diagram of an inverted triangle outlined in a heavy black border, with faint scan specks and a dark frame edge; a designer might take its stark geometric simplicity as a model for bold, minimal symbol design.
![Picture 1 of 1 from Combinations of colours and uncoloured light [microform] (1904), leaf 11](https://img.insideoutlibrary.com/img/200/ia-cihm_90718-11-0.webp)