HOMOGENEOUS YELLOW LIGHT. Ill 



will last as long as there is gas in the reservoir. 

 In place of a collar of cotton wick, a hollow 

 cylinder of sponge, with numerous projecting 

 tufts, may be used, or a collar may be similarly 

 constructed with asbestos cloth, and, if thought 

 necessary, it might be supplied with a saline solu- 

 tion from a capillary fountain. 



Haying thus obtained the means of illuminat- 

 ing any apartment with yellow light, let the 

 exhibition be made in a room with furniture of 

 various bright colours, with oil or water-coloured 

 paintings on the wall. The party which is to 

 witness the experiment should be dressed in a 

 diversity of the gayest colours ; and the brightest- 

 coloured flowers and highly-coloured drawings 

 should be placed on the tables. The room being 

 at first lighted with ordinary lights, the bright 

 and gay colours of everything that it contains 

 will be finely displayed. If the white lights are 

 now suddenly extinguished, and the yellow lamps 

 lighted, the most appalling metamorphosis will 

 be exhibited. The astonished individuals will 

 no longer be able to recognize each other. All 

 the furniture in the room, and all the objects 

 which it contains, will exhibit only one colour. 

 The flowers will lose their hues. The paintings 

 and drawings will appear as if they were executed 

 in China ink; and the gayest dresses, the brightest 

 scarlets, the purest lilacs, the richest blues, and 

 the most vivid greens, will all be converted into 

 one monotonous yellow. The complexions of the 

 parties, too, will suffer a corresponding change. 

 One pallid, death-like yellow, 



like the unnatural hue 



Which autumn paints upon the perished leaf, 



