258 



THE UNIVERSE. 



buildings executed by the great carnivorous birds, such as 

 the eagles, goshawks, and falcons, the lords of the air. 

 Fierce and solitary, the former perch their nests in the 



129. Nest of the Barn-Owl : Strix flammea (Linnaeus). From the Rouen Museum. 



midst of the most horrible precipices, without dreading 

 either the roar of the cataract or the crash of the ava- 

 ianche. The bulk of the work and the mass of the mate- 



