﻿102 



RICHMOND. 



The following table gives the results of analyses of some Philippine 

 limestones : 



Table No. 11.—. 



Analyses of some Philippine limestones 



[calculated to 



calcined material). 





l. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 



10. 



11. 



Silica (Si0 2 ) 



1.0C 



2.19 



0.49 



1.55 



0.89 



2.49 



0.37 



0.57 



1.15 



0.62 



0.01 



Iron (Fe 2 3 ) 



.29 



.24 



.38 



.82 



.39 



.90 



1.25 



.26 



.67 



.84 



.29 



Lime (CaO) 



94.80 



94.24 



98.12 



96.34 



97.41 



94.62 



96.88 



97.00 



96.92 



95.91 



97.39 



Magnesia (MgO) . 



1.96 



2.44 



.98 



1.27 



.48 



.21 



.72 



1.40 



1.24 



.51 



2.39 



Note. — Numbers 1 and 2 are from Anabang near Angat and from Santa Mar- 

 garita Springs respectively, both in Bulacan Province, Luzon; 3 and 4 are from 

 the quarries near Binangonan, Rizal Province, Luzon; 5 and 6, from Batan 

 Island near Legaspi, Albay Province, Luzon; 7 and 8 are taken from near 

 Dumarao and Pilar, Capiz Province, Panay; 9 is a coral limestone from Malabon 

 on Manila Bay; 10, a suitable caustieizing lime; 11, a suitable liquor-making lime. 



LOADING MATERIALS. 



Kaolin. — While but little prospecting work has been done on the 

 clay deposits of the Philippines, there seems little doubt but that the 

 supply which may be obtained is so extensive that the question of 

 importing this crude chemical will never arise. A general inquiry con- 

 cerning Philippine clay deposits for the purpose of establishing a school 

 for pottery making has been begun by the Bureau of Education and a 

 systematic study of the physical and chemical properties of various clays 

 for different economic uses is under way in this Bureau at the present 

 time. Below is given the chemical composition of some clays from 

 Laguna Province and from the Island of Eomblon : 



Table No. 12.- — Chemical composition of some clays from Laguna, Province and from the 



Island of Romblon. 



Moisture, loss at 100°-110 



Loss on ignition 



Silica (SiO») 



Aluminia (A1»0 3 ) 



Ferric oxide (Fe 2 3 ) 



Lime (CaO) 



Magnesia (MgO) 



Alkalis (NasO.KsO) 



Specific gravity 



0.30 

 12.27 

 47.56 

 38.12 



0.08 

 .39 



0.0 



1.28 



2. 8625 



10.15 



10.77 



42.77 



33.48 



1.04 



1.61 



.16 



.11 



2. 5585 



J. 09 



11.27 



43.50 



35.48 



Trace. 



.17 



.41 



2.08 



9.10 

 12.79 

 41.16 

 35.84 



.67 

 .42 

 .02 



2. .5451 



A. 



1.60 



12.56 



44.30 



38.64 



.83 



.39 



.42 



1.18 



2.91 



1.24 

 12.67 

 45.24 

 37.59 



1.00 

 .66 



1.69 



2.66 

 13.50 

 44. 15 

 36.54 



1.04 

 .15 



0.63 



13.73 



47.76 



37.04 



.75 



.06 



.14 



.52 



2.46 



Note. — Numbers 1, 2, 3, and 4 are taken from Griffin and Little, 10 as suitable 

 clays for paper makers; A, B, and C are Philippine clays from Laguna Province; 

 D is from Romblon. 



"Chem. Paper Making: (1894) 31G. 



