Dalburg AND Pratt: Bulacan Iron Ores.] 



[Phil. Journ. Sci., IX, A. No 3. 





^A 



Fig. 1. Granular magnetite in fibrous amphibole (tremolite ?), hanging wall Constancia ore 



body: natural size. 



Fig. 2. Specimen across wall of magnetite vein in limestone, Camaching; natural size. 



PLATE II. 



