Observations on theory of light and colours
                                Date
                            
                            
                                20 January 1676
                            
                            
                        
                            
                            
                            
                                Creator
                            
                            
                                Unknown, Artist
                            
                            
                        
                            
                            
                            
                                After
                            
                            
                                Isaac Newton (1642 - 1727, British) , Natural philosopher
                            
                            
                        
                            
                            
                            
                                Object type
                            
                            
                            
                        
                            
                            
                            
                                Archive reference number
                            
                            
                            
                        
                            
                            
                            
                                Manuscript page number
                            
                            
                                p101
                            
                            
                        
                            
                            
                            
                                Material
                            
                            
                            
                        
                            
                            
                            
                                Dimensions
                            
                            
                                height (page): 362mm
width (page): 225mm
                            
                        
                            
                            
                            width (page): 225mm
                                Subject
                            
                            
                            
                        
                            
                            
                            
                                Description
                            
                            
                                This drawing is part of the 24th observation, in which Isaac Newton observes rings of colour by putting two object glasses on top of each other. He saw more rings by looking through a prism.  
The paper was read before the Royal Society on 20 January and 3 February 1676, and was subsequently incorporated into Newton's Opticks (1704).
                            
                            
                        
                            
                            
                            The paper was read before the Royal Society on 20 January and 3 February 1676, and was subsequently incorporated into Newton's Opticks (1704).
                                Transcription
                            
                            
                                p. 101: The middle part of those arcs became also confused, so as to disappear and constitute an even whitened whilst on either Side their ends, as also the whole Arcs farthest from the center became distincter then before, appearing in the forme you see them here designed.
Transcribed by the Making Visible project
                            
                        
                            
                            
                            Transcribed by the Making Visible project
                                Object history
                            
                            
                                At the meeting of the Royal Society on 20 January 1676, ‘There was also read the beginning of Mr. Newton’s discourse, containing such observations, as conduce the further discoveries for completing his theory of light and colours, especially as to the constitution of natural bodies, on which their colours or transparency depend: in which he describes first the principal of his observations, and then considers and makes uses of them. At this time there were read the first fifteen of those observations as follows’ (Birch 3:272). The text and figures are printed in Birch 3:272-79. The remainder of the paper was read on 3 February 1676. The text and figures are printed in Birch 3:280-95.
Printed as Fig. 5 on Plate 2 from Book 2 of Isaac Newton, Opticks, or a treatise of the reflections, refractions, inflexions and colours of light (London: 1704).
                            
                        
                            
                            
                            Printed as Fig. 5 on Plate 2 from Book 2 of Isaac Newton, Opticks, or a treatise of the reflections, refractions, inflexions and colours of light (London: 1704).
                                Related fellows
                            
                            
                                Isaac Newton (1642 - 1727, British) , Natural philosopher
                            
                            
                        
                            
                            
                            
                                Associated place