Two diagrams
                                Date
                            
                            
                                late 17th century
                            
                            
                        
                            
                            
                            
                                Creator
                            
                            
                                Unknown, Artist
                            
                            
                        
                            
                            
                            
                                Object type
                            
                            
                            
                        
                            
                            
                            
                                Archive reference number
                            
                            
                            
                        
                            
                            
                            
                                Manuscript page number
                            
                            
                                f162 p3
                            
                            
                        
                            
                            
                            
                                Material
                            
                            
                            
                        
                            
                            
                            
                                Dimensions
                            
                            
                                height (page): 215mm
width (page): 168mm
                            
                        
                            
                            
                            width (page): 168mm
                                Subject
                            
                            
                            
                        
                            
                            
                            
                                Description
                            
                            
                                Diagrams in an incomplete draft for David Gregory's Catoptricae et dioptricae sphaericae elementa (1695).
                            
                            
                        
                            
                            
                            
                                Object history
                            
                            
                                David Gregory, Catoptricae et dioptricae sphaericae elementa (Oxford: e Theatro Sheldoniano, 1695), p. 42: Propositio XI, Problema IV.
                            
                            
                        
                            
                            
                            
                                Related fellows
                            
                            
                                David Gregory (1659 - 1708, British) , Astronomer, Astronomer