95 



Fig. 4. — Metal melted at 550" and pour- 

 ed on a warm iron plate. Upper 

 surface. X 50 



Same conditions as in Fig. 4. 

 Upper surface, x 50 



Fig. 6. 



-Same conditions as in Fig. 

 Upper surface, x 50 



Fig. 



-Same conditions as in Fig. 4. 

 Upper surface, x 50 



