378 



cox. 



Chemical analyses. 

 [Figures give percentages.] 













Fluxes. 





Water (H2O). 











i 

















. 





© 



OJ 





ce 











Source. 



^' 



< 





-a 



M ■ 



o 



M • 



o 



?. 



°A 



?; 



^.4 



s 





CO 



a 



En 



is 



a" 



o 



a 



13 



c m 

 2 





1 



> 

 





-Eh 

 ei 







Eh 



Crude kaolin 



























Webster, N. C __ 



62.40 



26.51 



1.14 





0.57 



0.01 



0.98 



8.80 



0.25 





2.70 



Washed kaolin, 

























Webster, N. C .. 



45.78 



36.46 



0.28 



1.08 



0.50 



0.04 



0.25 



13.40 



2.05 





2.15 



Glen Allen, Mo __ 



72.30 



18.94 



0.40 





0.68 



0.39 



0.42 



7.04 







1.91 











Physical properties. 



Source. 



Water 



added to 



give a 



workable 



paste 

 (percent 



total 

 weight) . 



Tensile strength 



of the air-dried 



sample. 



Shrinkage (per cent). 



1 



Kilo per 

 square 

 centi- 

 meter. 



Pounds 



per 

 square 

 inch. 



Air. 



Fire at 

 cone 

 No. 9. 



Total. 



Webster N. C - 



42.0 

 23.2 



1.55 

 0.84 



22 

 12 



6 

 4 



4 

 8.4 



10 

 12.4 



Glen Allen, Mo 









The chemical composition of the claj'S given below shows them as 

 they occur and may include impurities that may be removed by washing, 

 sieving, etc. 



MATIQUIO. 



The outcrops appear at various places along the Butadero Kiver 

 northwest of Matiquio. Three outcrops, which have been staked by 

 Laguna Province, are about an hour's walk from Matiquio. They are 

 very close together, the prismatic compass shows them to be 13° west of 

 north of Pila and the aneroid barometer shows their altitude to be 240, 

 300 and 270 meters, respectively. The natives report that formerly 

 1,000 five-kilo baskets were taken from this point and shipped for use 

 at Bilibid. All three of these outcrops are on the st^ep hillside, perhaps 

 40 meters above the river. The clay slopes wash down easily and one 

 outcrop was so obliterated that it was impossible to obtain a sample. 

 The other two were readily uncovered and show that most of the 

 thoroughly weathered clay has been removed, or that the material has 

 not yet been completely weathered. Most of the post-auger holes gave 

 very gritty and imperfectly weathered samples. They all contain pyrites, 

 which will prevent their burning to a white product. 



