122 



WELLS'S NATURAL PHILOSOPHY. 



painting stand as a fire-board. Our houses are for use, and architecture is, 

 therefore, one of the useful arts. In building, we should plan the inside first, 

 and then the outside to cover it. It is in bad taste to construct a dwelling- 

 house in the form of a Grecian temple, because a Grecian temple was intended 

 for external worship, not for a habitation, or a place of meeting.* 



Fig. 102. 



Entablature. . 





. Cornice. 

 . Frieze. 

 .Architrave. 

 .Capital, 



.Shaft 



Stylobate, or Pe- ^ 

 d<!Btal 



Base. 



Ctrnice. 



Die. 



Plinth. 



How may an 

 estimate of the 

 durability of 

 Btone for archi- 

 tectural pur- 

 poses be made ? 



284. In selecting a stone for architectural purposes, we maj 

 be able to form an opinion respecting its durability and per- 

 manence. By visiting the locality from whence it was ob- 

 tained, we may judge from the surfaces which have been long 

 exposed to the weather if the rock is liable to yield to atmos- 

 pheric influences, and the conditions under which it does so. For example, 

 if the rock be a granite, and it be very uneven and rough, it may be inferred 

 that it ia not very durable; that the feldspar, which forms one of its compo- 



* Prof. Henry. 



