Optics Scientific views optical sight 1780's rare plate book encyclopedia(Old Books, 18th Century Books, Optics, Scientific Diagrams, Technology, Human Eye, Optical Tools). VIII Optique. Conteneant Planches Simples, 18. Published c. 1780's, Paris. c. 36 pages. Text in French. Rare original fascicule illustrated with 150 figures on 18 copper engraved plates, the entire suite relating to optics for (likely) Diderot's monumental encyclopedia. All individual engraved plate fascicules of this era are inherently scarce rare