OF ARKANSAS, .- 119 
where they form synclinal folds or troughs, is salt. By boring a few hun- 
dred feet, in some favorable position, it is highly probable a productive 
brine might be reached. Such a place is the Clay lick, on the property of 
Maj. John Billingsley, on the east prong of the Illinois river, near where 
the mountain road crosses that stream. I tested water which oozes up in 
this lick, and found it to contain a notable quantity of chloride of sodium, 
er common salt, some chloride of magnesium, and only a trace of sulphates. 
é < The succession, in the 
3 [3 id h-west of 
g is ridge south-west 0 
eel 
mire where the road crosses 
Soft brown sandstone. the East fork of the Illi- 
A few feet of limestone. nois river, is represented 
TT | SAO) Seadatone: in the annexed diagram, 
the levels commencing 
in the bed of the Hast 
fork of the Illinois river, 
30) Teruesuada sandy shales. and extending to the top 
of the ridge, over which 
the road passes. 
iva) 
oo 
a 
US 
| On the waters of the 
70) Archimedes limestones. same branch of the Ili- 
nois river, on Dr. Kuy- 
peed . kendall’s place, a fine 
chalybeate spring issues from the bed of ferruginous sandstone of the mill- 
stone grit series. This water has a powerful deoxidizing effect, instantly 
blackening a silver solution, even without the addition of ammonia; from 
this fact and the comparative small amount of carbonic acid present, it is 
probable that the protoxide of iron present, is held in solution by some 
organic acid. This water will probably be found to have valuable alterative 
and tonic effects combined. 
About a quarter of a mile from Dr. Kuykendall’s there is also a sulphur 
spring, which I tested and found it to contain, as its principal constituents : 
Free sulphuretted hydrogen. 
Chloride of sodium. 
Chloride of magnesium. 
Only a trace of sulphates. 
Bi-carbonate of lime. 
Bi-carbonate of magnesia. 
This water, having more saline matter (particularly chlorides) than the 
water tested at Thomas’s, 2 miles from Fayetteville, will be found more 
