Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 225
Section VI.—The Eye.* 736. The Eye consists of a firm outer coating, shown aswhite in Fig. 254, to keep the eye in its proper globular … Fig. 254. form. Inside of this is a dark coating, the heavy blackline, which absorbs all li^ht that does not assist in forming *The eye is here considered only as an optical instrument: for full discus-sion, consult some good Physiology. 216 OPTICS. the image. Inside of all is the retina, an…
Physics
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![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-204-22.webp)
