of Bronzes from Macliu Picchu, Peru. 



519 



some of the grains are fragments of the original distorted grains 

 which would further recrystallize at higher temperatures. 

 The higher temperature ranges of all curves described therefore 

 represent normal coalescence of the natural grains. Experience 



. Fig. 5. 



24,000 



22,000 



20,000 



18,000 



16,000 



14,000 



12,000 



10,000 



8,000 



6,000 



4,000 



2,000 



625° 700° 775° 850° . 



Temperature 



Growth of grain on annealing after 25$ reduction by cold-rolling. 

 Bronze containing 96$ Cu. 









































'60 m 



















1 I 

 1 \ 



















1 



1 



/ 

 f j 



















1 

 1 



1 



















i 



1 

 / 





>30m 















/ 

 / 

 / 



/ 



















/ 

 / 



/ 

 f 

















/ 



/ 

 / 

 / 

















/ 



/ 











10m 







^ 



^ 



s 

































5m 







--' 

















has shown that the grain size produced by anneal under 

 uniform conditions is very nearly independent of the magnitude 

 of previous deformation, provided this has been considerable. 

 While it is difficult to clearly specify the amount of reduction 



