Opticks : or, A treatise of the reflections, refractions, inflections and colours of light . M 4 THE. THE SECOND BOOK OF OPTICKS. P A R T I. Obfervations concerning the Reflexionsy Re-fraBionSy and Colours of thi^t tranfpa-rent Bodies, T has been obferved by others,that tranfparent Subftances, asGlafs, Water, Air, &V. whenmade very thin by being blowninto Bubbles, or otherwife formedinto Plates, do exhibit various Co-lours according to thcjr various thinnefs, altho at a greater

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Keywords: ., bookauthornewtonisaacsir16421727, bookdecade1, booksubjectoptics