HENDERSON COUNTY. 199 



some may by judicious mixture with other clays be suitable for sewer pipe 

 uses. Owing to the open texture to which ware made of the other clays 

 burn, none have been found upon experimentation to be suitable for the man- 

 ufacture of this class of clay goods. The drain tiling made by the Texas 

 Fire Brick and Tiling Company is of a good quality and will admit of trans- 

 portation for long distances. 



The following analyses are from clays dried at 115° C, obtained at the 

 Henry Morrison pit and from a clay bank used by Mr. Morrison as a mix- 

 ture in the manufacture of ornamental bricks and paving tiles: 



HENRY MORRISON PIT. 



Silica . 72.30 



Alumina 19.33 



Ferric oxide. 2.47 



Soda 4.44 



Potash ... Trace. 



Lime .' ...... Trace. 



Magnesia.. 0.50 



Loss on ignition not determined , 



99.04 



Sand 5.85 



Specific gravity 2.22 



RED CLAY FROM J. B. ATTWOOD SURVEY. 



Silica ..' 61.90 



Alumina 23.70 



Ferric oxide ... 5.50 



Soda 1.27 



Potash . Trace. 



Lime Trace. 



Magnesia 1.11 



Loss on ignition 6.52 



100.00 

 Specific gravity ... 1.93 



THE CLAY INDUSTRY. 



There are four establishments for the manufacture of fire bricks, tiles, and 

 pottery in the neighborhood of Athens, viz. : 



The Texas Fire Brick and Tile Company. — This is the most extensive 

 clay working plant in Athens, and devotes its whole Attention to the manu- 

 facture of refractory goods, such as fire bricks, furnace and cupola linings, 

 and grate backs. Drain tiles are also made by this company, and sewer pipes 

 were also made for some time, but owing to the unsuitable quality of the 

 clay for this purpose the manufacture of sewer pipes has been abandoned. 



The clay used for the manufacture of these bricks after being taken from 



