Diagram relating to Alhazen's problem
                                Date
                            
                            
                                31 August 1672
                            
                            
                        
                            
                            
                            
                                Object type
                            
                            
                            
                        
                            
                            
                            
                                Archive reference number
                            
                            
                            
                        
                            
                            
                            
                                Manuscript page number
                            
                            
                                p339
                            
                            
                        
                            
                            
                            
                                Material
                            
                            
                            
                        
                            
                            
                            
                                Dimensions
                            
                            
                                height (page): 313mm
width (page): 197mm
                            
                        
                            
                            
                            width (page): 197mm
                                Description
                            
                            
                                The debate between Huygens and Slusius about the solution to the problem of finding a point of reflection on the surface of a spherical mirror in relation to two points, the eye and the visible object, attributed to Alhazen (Ibn al-Haytham (965-1045)) had been discussed at the meetings of the Royal Society on 3 July 1672 and 18 December 1672.
This diagram is from Slusius's discussion of Alhazen's problem in a letter to Oldenburg, which was printed in Philosophical Transactions of the Royal Society, vol. 8, no. 98 (November 1673), pp. 6145-46.
The diagram in the letter is at EL/S1/72/003. There is another copy at LBC/5/371.
                            
                            
                        
                            
                            
                            This diagram is from Slusius's discussion of Alhazen's problem in a letter to Oldenburg, which was printed in Philosophical Transactions of the Royal Society, vol. 8, no. 98 (November 1673), pp. 6145-46.
The diagram in the letter is at EL/S1/72/003. There is another copy at LBC/5/371.
                                Transcription
                            
                            
                                Prid. Kal. Septemb.
Transcribed by the Making Visible project
                            
                        
                            
                            
                            Transcribed by the Making Visible project
                                Related fellows
                            
                            
                                Renatus Franciscus Slusius (1622 - 1685, Belgian) , Mathematician
Henry Oldenburg (1612 - 1677, German) , Scientific correspondent
                            
                        
                            
                            
                        
                            
                            
                        
                    Henry Oldenburg (1612 - 1677, German) , Scientific correspondent