Plate, spectra of Jupiter, sky, and β cygni by unknown artist Figures 3-4 showing the spectrum of Jupiter's light compared with that of the sky, and the orange and blue spectra of β cygni. Subject: Astronomy Published in Philosophical Transactions as 'On the spectra of some of the nebulœ. A supplement to the paper “On the spectra of some of the fixed stars"'. Later manuscript emendation indicates that the paper was communicated by either Professor [George Gabriel] Stokes or Dr [William Allen] Miller. Received by the Royal Society on 8 September 1864. 1864