REPORTS OF GEOLOGISTS. lxxxiii 



Albany to Haskell. At that locality we found the contact between the two 

 formations. From thence we traveled almost west to the Double Mountains, 

 in the western edge of Stonewall County. From there we went south to 

 Sweetwater, on the line of the Texas and Pacific Railroad, passing through the 

 town of Fisher, sending the balance of the party back to Albany. From 

 Albany we ran a line of levels on a northwest line to Kiowa Peak, in the 

 northeast corner of Stonewall County. From thence we went west to the 

 edge of Kent County. Thence southwestward to the Salt Fork of the Brazos 

 River, and carried the line to the mouth of White River. Thence up that 

 river to the edge of Floyd County. 



Mr. N. F. Drake had charge of the topographic work on this trip, and has 

 proven himself quite efficient in his work, the results of which will be pub- 

 lished in a later report. 



The difference of present altitude above sea level between the lowest and 

 highest beds of the Permian, as determined by this Survey, is 916 feet. 

 This would be on a line from Clear Fork of the Brazos, near the line of 

 Shackelford County, to Dockum, in the western edge of Dickens County. 



W. F. CUMMINS, 



Geologist. 



REPORT OF MR. R. T. HILL. 



Austin, Texas, March 31, 1890. 

 Mr. E. T. Dumble, State Geologist : 



Dear Sir — In accordance with your request upon organization of the Sur- 

 vey, I undertook, in February, 1889, in co-operation with my duties as in- 

 structor in the University of Texas, the study of the natural features of those 

 portions of the State known as the Black and Grand Prairie regions and the 

 accompanying Upper and Lower Cross Timbers, all of which are the surface 

 features of the Cretaceous rocks, to which they owe their topographic indi- 

 viduality, economic possibilities, and conditions for human habitation. 



The work was originally taken up with the hope of bringing the instruc- 

 tion given my classes into closer contact with the practical side of Geology 

 by the utilization of the students in the field and training them for positions 

 upon the Survey; but this was found to be impracticable, and you gave me 

 the assistance of the young men whose names and service are mentioned 

 more fully in the accompanying pages, by whose faithful and painstaking 

 labor much has been accomplished. In the month of July I received an ap- 

 pointment as Assistant Geologist upon the United States' Geological Survey, 



