Credit: © The Royal Society
                             
                         
                     
                         
                         
                             
                                 Image number: RS.10048
                             
                         
                         
                     
                 
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            Diagrams of the zodiacal light as seen in autumn
                                Date
                            
                            
                                1848
                            
                            
                        
                            
                            
                            
                                Creator
                            
                            
                                Charles Piazzi Smyth (1819 - 1900, British) , Astronomer
                            
                            
                        
                            
                            
                            
                                Object type
                            
                            
                            
                        
                            
                            
                            
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                                Material
                            
                            
                            
                        
                            
                            
                            
                                Dimensions
                            
                            
                                height (drawing): 235mm
width (drawing): 188mm
                            
                        
                            
                            
                            width (drawing): 188mm
                                Subject
                            
                            
                            
                        
                            
                            
                            
                                Description
                            
                            
                                Four diagrams of the appearance of the zodiacal light as it would appear when observed on 21 September at a latitude of 56 degrees south (figures 1 and 2) and at 56 degrees north (figures 3 and 4). The light is shown as lenticular in shape and each diagram is marked with lines of the equator, poles, horizon and ecliptic.
Illustration from the unpublished paper "Attempt to apply instrumental measurement to the zodiacal light...”, by Charles Piazzi Smyth. The paper was written or completed on 25 March 1848 and received by the Royal Society on 13 April. It was eventually withdrawn on 2 November 1848.
Inscribed in ink: “Plate 2 p.6 Diagrams of the Zodiacal Light as seen on Sept 21, a.m and p.m in lat. 56 S, and in lat 56 N.”
                            
                            
                        
                            
                            
                        
                            
                            
                        
                    Illustration from the unpublished paper "Attempt to apply instrumental measurement to the zodiacal light...”, by Charles Piazzi Smyth. The paper was written or completed on 25 March 1848 and received by the Royal Society on 13 April. It was eventually withdrawn on 2 November 1848.
Inscribed in ink: “Plate 2 p.6 Diagrams of the Zodiacal Light as seen on Sept 21, a.m and p.m in lat. 56 S, and in lat 56 N.”