ILLUSTRATIONS 



Plate I 



Steamed pats of nonseasoned cements 1, 2, 3, 4 (Table IV), 5, la, 2a, and 

 3a (Table VII), showing perfect soundness. 



FUATE II 



Fig. 1. Naga, Cebu, raw materials, and the resulting Portland clinker, 

 cement, and concrete exhibited at the 1914 Philippine Exposi- 

 tion. % actual size. 

 2. Naga, Cebu, raw materials and the resulting Roman clinker, cement, 

 and concrete exhibited at the 1914 Philippine Exposition, i^ 

 actual size. 



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