WONDERS OF THE MICROSCOPE 249 



beautiful and easily obtained object. Again, the 

 skin of the eel may likewise be considered. In 

 this instance the scales do not project above the 



Fig. 168. Leg of a Tiger Moth 



surface, hence the popular impression that the 

 slippery eel has no scales. However, a fragment 

 of the dried skin is shown in Fig. 171 sufficiently 



