﻿CLAYS FROM LUZON. 417 



7. Kaolin or china clay from the west side of Pajo Arroyo. Laguna Province. 



Approaches closely to kaolinite in composition. Taken from the bottom of 

 a pit 3 meters deep. 



8. Kaolin or china clay from Tagonton-Paracale, Camarines. Taken from the 



wall next to the vein in the San Mauricio mine. 



9. Kaolin or china clay from Bauan Solfatara near Point Oazador, Batangas 



Province. 



10. Kaolin or china clay from the east side of Pajo Arroyo, Laguna Province. 



Taken from the bottom of a pit 3 meters deep. 



11. Kaolin or china clay from Bucay, Abra. 



12. Kaolin or china clay from Calamba, Laguna Province. 



13. Kaolin or china clay from Nasugbu, Batangas Province. 



14. Kaolin or china clay from Albay Province. 



15. Kaolin or china clay from llocos Norte. 



16. Kaolin or china clay from llocos Norte. 



17. Kaolin or china clay from Matiquo, Laguna Province. 



18.a Kaolin or china clay from Dolores, Abra. Not quite white. 

 19. b Kaolin from Wolfson mine, Laguna Province. 



20. Kaolin from the district east of Nasugbu, Batangas Province. 



21. Silicious ferruginous kaolin. Exact source unknown. 



22. Silicious ferruginous kaolin. Exact source unknown. 



23. Kaolin from near Cervantes, Lepanto-Bontoc. 



24. White, silicious clay from San Agustin-Magalang, Pampanga Province. 



25. Dark, cream river clay from Laguna Province. 



26. Gray river clay from Laguna Province. 



27. Gray river clay from Laguna Province. 



28. Gray river clay from Laguna Province. 



29. Gray clay from Clarke's gold mine, Antimok, Benguet. This was refined by 



making an emulsion, passing through a 60-mesh sieve, and drying at 

 110° before analyzing. About 39 per cent of quartz and rock fragments 

 were retained on the sieve and discarded. 



30. Clay taken from the surface of a deposit of considerable extent which occurs 



on the banks of the Tinajeros River near Malinta. Bulacan Province. 

 Clay of this quality seems to abound along the route of the Manila and 

 Dagupan Railroad north of Caloocan. 



31. Brick clay from Bulacan Province. 



32. Common clay from Binangonan, Rizal Province. 



33. Clay used in Mandaloyan on the Pasig River, for making brick. Taken from 



the bottom of a pit about 2 meters deep. 



34. Clay from the first hills on the road to Bannangar, Rancherio Tablan, Benguet. 



35. Clay used to paint houses. Near Nasugbu, Batangas Province. 



36. Clay subsoil. 



37. Igorot clay. 



38. Igorot clay. 



a It may be possible to remove enough iron by washing to make this clay 

 available as an alkaline silicious kaolin. Otherwise it is of low value because 

 the quantity of iron oxide is great enough to give a red body after firing, it is 

 too alkaline for refractory ware and calcareous enough to have a low fusion 

 point. 



b It may be possible to remove iron from this by selecting and washing and 

 to make it available as a first-class china clav. 



