80 PHOSPHORESCENCE IN 



by the Swedish maiden on an orange-coloured 

 flower that of the garden nasturtium (Tropao- 

 lum majus, fig. 6) ; and most cases of plant phos- 



Fig. 6. 



phorescence hitherto recorded have been observed 

 upon flowers in which the orange and yellow 

 tints predominate. Indeed, whether we consider 

 phosphorescence in the mineral, the vegetable, or 

 the animal kingdom, whether we take into con- 

 sideration the colour of the substance which 

 shines or that of the light produced, we are for- 

 cibly led to notice that of all the colours of the 

 solar spectrum, the yellow and orange tints appear 



