290 



Mr. Ainger on the 



less dispersed, and therefore that the images are rendered 

 colourless by the superposition of various coloured spectra 



Fig. 9. 



formed by the same drop, but so nearly coincident as to leave 

 exposed no sensible colour. The course of the rays must have 

 been something like that shown in Fig. 10., where the faint 

 whole lines may represent red, the broken lines yellow, and the 

 dotted lines blue rays, decomposed from the incident light which 

 is represented by stronger whole lines, s s s. Each drop in the 



Fig. 10. 



luminous space would return spectra of these three colours, 

 although they would be decomposed from different rays of 

 white light, arriving at the drop under different angles of inci- 

 dence. Their spectra would not perfectly coincide; but, if their 



