198 THE IRON ORE DISTRICT OF EAST TEXAS. 



if the time be prolonged the ware shows a decided tendency to crack and 

 break. These clays do not admit of a good glaze, in so far that the Albany 

 slip used does not readily adhere to the ware, but scales off, leaving the open 

 body exposed. 



In the manufacture of open ware, such as milk jars, pans, churns, etc., or 

 such articles as may not be required to retain liquids for any prolonged 

 period, this clay will serve the purpose very well, and will make a strong, 

 durable article suitable for everyday use. For jugs and other articles re- 

 quired to retain oils, liquors, etc., for a prolonged period the clay is not suit- 

 able without a mixture of a more alkaline or fusible clay. 



The following is an analysis of an air-dried specimen of clay from bed 

 No. 1, used by M. K. Miller in his pottery: 



Silica 69 . 20 per cent. 



Alumina 21 . 03 per cent. 



Ferric oxide 1.37 per cent. 



Potash Trace. 



Soda 2.30 per cent. 



Lime Trace. 



Magnesia . 94 per cent. 



Loss on ignition . . . 5.16 per cent. 



100.00 



Sand 8.50 



Specific gravity 2 . 04 



The following analysis is from an air-dried specimen of clay obtained from 

 bed No. 3: 



Silica 70.80 



Alumina 18 56 



Ferric oxide 1 . 04 



Lime Trace. 



Potash r Trace. 



Soda .... 5.35 



Magnesia 1 . 58 



Water and loss 2 . 60 



99.93 



There is every probability that this clay, if properly worked, will be found 



to make a closer bodied ware and be more suitable for the manufacture of 



earthenware vessels than any of the other clays found in the vicinity of 



Athens. No tests have ever been made. 



4. MISCELLANEOUS CLAYS. 



There are several other classes of clays in the vicinity of Athens, all of 

 which are suitable for the manufacture of the ordinary draining tiles, and 



