HOCKING VALLEY. 703 



5. Prom Snow Pork, Section 31, Trimble to Ewing, 4.25 miles, the dip is 107 feet ; dip 

 per mile, 24.93 feet. 



6. From Section 7, Ward township, to Snow Fork. 1.77 miles, the dip is 45 feet ; dip 

 per mile, 25.42 feet. 



7. Prom Section 19, Ward, to Section 7, Ward, 2 miles, the dip is 46 feet ; dip per 

 mile, 23 feet. 



8. Prom Section 1, Green, to Section 19, Ward, 3 miles, the dip is 104 feet; dip per 

 mile, 34.66 feet. 



Nos. 1, 5, 6, 7, and 8 are on the same parallel, No. 1 being the entire 

 distance, of which 6, 6, 7, and 8 are parts showing the moderately undu- 

 lating horizon of the coal. 



To determine the line of strike, I select distant points where the coal 

 is found at the same elevation. In Section 17, Ward township, the coal 

 is 167 feet above the lake ; at Ferrara, north line of Section 22, Monroe 

 township, it is at the same level. The bearing is north 33° east, which 

 is the line of strike, and the line of greatest dip is south 57° east. 



In the north part of Section 19, Ward township, the coal is 231 feet 

 above the lake, and near the centre of Section 32, Pleasant township, it 

 is at the same level. The bearing and line of strike is north 26° east, 

 distance IB^ miles. The line of dip is south 64° east. NL=ar the centre 

 of Section 32, Ward township, it is 270 feet above the lake, and in the 

 south-west part of Section 24, Pleasant township, it is at the same level, 

 distance 14|- miles. The bearing and line of strike is north 22° east ; 

 line of dip south 68° east. 



It will be noticed that to the eastward the line of strike makes a 

 greater angle with the meridian than at the west. 



In Section 21, Salt Lick, the coal is 289 feet above the lake, and in Sec- 

 tion 6, Trimble township, 76 feet ; the distance is 8-?r miles, and sub- 

 stantially on the line ; dip per mile, 25.05 feet. 



These observations indicate that the average dip is about 25 feet per 

 mile, and that the line of greatest dip generally varies from south 68° 

 east to south 57° east. 



Mr. Nichols's section, from Haydenville to Section 2, Trimble, is 12 6-10 

 miles; dip, 300 feet; dip per mile, 24.38 feet. His section, from south 

 part of Dover to Moxahala, is 18.86 miles; dip to the north,.218 feet; 

 dip per mile, llj feet. Had he made the northern terminus of this sec- 

 tion at Marshallville, a little less than eleven miles, the dip would have 

 been south about 19 feet per mile. With these irregularities and undu- 

 lations, which are admirably illustrated by Mr. Nichols's charts, and 

 which effect the strata at different horizons very differently, so that they 

 are constantly approaching or receding from each other, if. is evident 

 that both the direction and the amount of the dip are factors which are 



