The boy's own book of indoor games and recreations : a popular encyclopædia for boys (1890)
Stables, Gordon, 1840-1910, Hutchison, George Andrew, 1841-1913 · Philadelphia : J.B. Lippincott · leaf 390
A 5 Fig. I. iig. 2. … in the diagram (Fig. i), and placing an object at a, or standing them on a piece ofcolour work, notice the beautiful geometrical pattern formed by the variousreflectors. Having experimented with various articles at the angle given, try theeffect at another angle, and note how the slightest change…
Games · Amusements
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-277-31.webp)