MOSSES WITH A HAND-LENS 



87 



to see the glow one must look into the cave in the direction from 

 which the light enters and care must be taken not to shut off all 

 the entering light, as the Luminous Moss, like the moon, shines 

 by reflected light alone. If one attempts to gather the glowing- 

 substance he will find nothing but dirt and stones with possibly 

 a few tiny green plants like those in the figure. The compound 

 microscope will reveal threads like those shown in the plate, but 

 the lens will show only a cobwebby appearance of fine green 



Figure 33. Schistosega osmundacea (From Bry. Eur.). 1, 2. Plants 

 natural size. 29. Protonema as it appears under the compound microscope. 



