80 PHOSPHORESCENCE IN 
by the Swedish maiden on an orange-colowred 
flower—that of the garden nasturtium (T’rop@o- 
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 
