510 



DEVELOPMENT OF PRIMAL SHAPING ARTS. 



crossing the line — or soon after crossing the line — separating the pre- 

 human from the lowest art stage, I assume that the act was first utilized 

 in the art sense, and that progress began. Being a simple act, and 

 constituting, as operated in fracturing stone, a simple process giving 

 immediate, tangible, and available results, I conceive that its use would 

 increase rapidly through early savage times, dominating the other 

 stone-shaping processes of that period and culminating in late savage 



Diagram of relative progress. 



times. The employment of the group of processes developed from 

 the simple fracturing act probably decreased to a considerable extent 

 in barbarian times as other processes came into prominence, but it has 

 continued in active use, especially in quarrying and roughing out 

 stone, for all classes of works, architectural, sculptural, and miscella- 

 neous, up to the present day. 



The second column is intended to indicate the development of the 

 arts which shape stone b}- bruising and crumbling its surface. 1 have 





