Preston, Thomas, Joly, Charles Jasper, 1864-1906, Parsons, John Herbert, Sir, 1868-1957, donor, University College, London. Library Services · London : Macmillan and Co. · leaf 142
ases the light which comes from the blue half of the paper through the prism to the eye does in like cir- cumstances suffer a greater refraction than the light which comes from the red half, and by consequence is more refrangible. Exper. 2. — About the aforesaid paper, whose two halves were painted… … were smaller and better defined. ... I placed a candle to illuminate the paper strongly, for the experiment was tried in the night. . . . Then at a distance of six feet and one or two inches from the paper upon the floor I erected a glass lens four inches and a quarter broad, which might collect…
![An illustration from The theory of light [electronic resource], 1901, leaf 142](https://img.insideoutlibrary.com/img/1024/ia-b21286462-142-0.webp)
