TWO YOUNG NATURALISTS. 



271 



and it rested quietly in this position concealed entirely 

 from the eye, and would indeed have remained so for 

 hours had it been necessary. 



"The grebe is a very strange creature. Can you 

 guess what plan it has invented to save itself the 

 trouble of hatching its eggs ? It builds its nest at the 



COCKTAIL BJiKTLE (OciJpUS utill 



surface of the water with green leaves and vegetables, 

 being apparently aware that this material in the pro- 

 cess of fermentation will develop sufficient heat to 

 enable the bird to dispense, at any rate to some extent, 

 with the process of incubation. 



" Better still ! As this fermentation could not be pro- 

 duced without a disengagement of deleterious gases, 



