Combinations of colours and uncoloured light [microform]
A 1904 Toronto university library microform record of Susannah Amelia Chown's study of colour combinations and uncoloured light, presented as a scientific treatise with numbered plates. The two pictures are plates of line graphs plotting curves across numbered columns with labelled rows, set on pages with dense typeset text and small captions.
![Picture 1 of 2 from Combinations of colours and uncoloured light [microform] (1904), leaf 31](https://img.insideoutlibrary.com/img/200/ia-cihm_990718-31-0.webp)
![Picture 2 of 2 from Combinations of colours and uncoloured light [microform] (1904), leaf 45](https://img.insideoutlibrary.com/img/200/ia-cihm_990718-45-0.webp)