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108 p r e f e r e n c e t o s u p e r s e d e low c o s t a s a f a c t o r i n s e l e c t i n g m a te ria ls . P u g m ills w ere im p o r te d , c a p a b le o f p ro d u c in g a h ig h - g r a d e b r i c k , and t o g e t h e r w ith im p o rte d s u p e r i o r g ra d e s o f lu m b e r, t h e r e em erged a p red o m in an ce o f lum ber and b r i c k , s i g n a l i n g a r a p i d d e c l i n e and th e u l t i m a t e end t o adobe, l o g , and s t o n e . T h u s, th e t h i r d p h a se was th e b e g in n in g o f t h e end t o f o lk b u i l d i n g m a t e r i a l s p r o d u c tio n . T h ird p h a se was a l s o th e a g e o f d i s g u i s i n g ( o r p r e s e r v i n g ) o ld w a lls w ith new o r im proved v e n e e r in g m a t e r i a l s su c h a s h ig h lim e p l a s t e r s , p o r tl a n d cem ent p l a s t e r , and s i d i n g (T a b le 6 ) . As th e b u i l d i n g m a t e r i a l s c h an g e d i n tim e and p la c e , s o a l s o d id th e s t r u c t u r e s . Y e t, no b u i l d i n g ty p e o r form i s s t r i c t l y a s s o c i a t e d w ith one s p e c i f i c ty p e o f b u ild in g m a te ria l. N e e d le s s t o s a y , th e s h a p e o r f l o o r p la n o f a h o u se o r c a b in can be d u p l i c a t e d w ith a number o f d i f f e r e n t c o n s tru c tio n m a te r ia ls . B ut j u s t a s t h e r e w ere e v o lu tio n a r y p h a s e s i n th e a c q u i s i t i o n , p r e p a r a t i o n , and u t i l i z a t i o n o f b u i l d i n g m a t e r i a l s , w hich p u l s a t e d o u tw ard from th e r e g i o n a l c o re t o th e f r i n g e , so a l s o w ere t h e r e e v o lu t io n a r y c h an g e s i n house form b e g in n in g i n i t i a l l y w ith t h e s im p le m a k e s h ift and e n d in g w ith th e more co m p lex . T h is s u b j e c t w i l l be c o n s id e r e d i n C h a p te rs I I I and IV. Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.