A Story Outline of Evolution 



use of poles tied together at the top and covered with the 

 skins of animals. 



His first Idea in building was one of shelter and the 

 idea of beauty In structure had not been conceived. He 

 learned that flat, smooth stones could be more easily fitted 

 together than round ones could be and that the rough, 

 irregular stones could be worked into smooth, square, or 

 rectangular ones; that mortar made of clay would bind and 

 hold these stones together and that it would also shut out 

 the cold air that penetrated through the openings. He made 

 bricks of clay and dried them In the sun or baked them in 

 heated ovens. With these he shaped his structures as he 

 desired. He hewed great stones into shape and placed them 

 one upon another until he had erected houses that would with- 

 stand the storms of centuries. 



It was thus that the art of building was begun at a time 

 which antedates the earliest written history. From these 

 first ideas of shelter structures, there has grown the beauty 

 and design of both ancient and modern architecture. From 

 the single hut of stone, mud or grass, there have arisen the 

 Pyramids of Egypt, the structures of Greece and Rome and 

 the modern tall buildings of the American cities, with all 

 the intervening designs of structures. Fancy is a fad and as 

 fancy changes, the new gives way to the old and then returns 

 again to the new. As ground space becomes more desired, 

 additional stories are added and extended skyward and this 

 will doubtless continue until the tensile strength of all build- 

 ing material shall have reached a point where safety com- 

 mands that a halt be made. 



[42] 



