IN THE UPPER RIO GRANDE EMBAYMENT IN TEXAS. 103 



7. Puddling clay of good quality exists in the Del Rio clay 

 near Del Rio. 



8. Asphalt, known to exist in limited quantities, and in im- 

 pure state in the Pullian foi'mation near the company's lands, but 

 not believed to warrant the expense of special search. 



9. Saltpeter, known in small and commercially unimportant 

 quantitj". 



10. /^atg-uaco, known in small and commercially unimpor- 

 tant quantity. 



