id author title date pages extension mime words sentence flesch summary cache txt dul1.ark:-13960-t1tf0sj2n Brown, J. H. Spectropia; Or, Surprising Spectral Illusions. Showing Ghosts Everywhere, And Of Any Colour. [by J. H. Brown] With Sixteen Illustrations. 1864 .txt text/plain 2903 158 74 A ghost, according to the general descriptions of those who fancy they have been favoured with a sight of one, apjjears to I)e of a pale phosphorescent white, or bluisli white colour ; usually indistinct, and so transparent that objects are easily seen through it. When the three primary colours are mixed together, white is tlie result : so that when a ray of white light falls upon a piece of paper, and all the vibrations are equally reflected, the paper will appear white, and if they are all absorbed, it will ajipear black ; but, if the paper absorbs .*ome and reflects others, it will ajijiear coloured. cache/dul1.ark:-13960-t1tf0sj2n.txt txt/dul1.ark:-13960-t1tf0sj2n.txt