c. 1920: Hand-coloured flowers

A set of hand-coloured lantern slides of Albertan flowers and plants created by William McCalla (1872-1862), a botanist and teacher. From childhood, McCalla had had an interest in botany as well as photography, and in 1920 he published an illustrated book, Wild Flowers of Western Canada.

McCalla made over one thousand hand-coloured lantern slides of plants and animals to help with his teaching.