The magician's own book, or The whole art of conjuring (1862)
Arnold, George, 1834-1865, Cahill, Frank · New York, Dick & Fitzgerald · leaf 176
e said to be refracted, or bent outof their course, as seen in the draw-ing. The ray of light proceedingfrom B through tb^ glass l g is bentfrom the point c, instead of passingin the direction of the dotted line.But if the ray f c falls perpendicularlyon the glass, there is no refraction, and it…
Magic tricks
Internet Archive · University of Pittsburgh Library · 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-341-38.webp)
