1884.] On the Evidence that the Earth's Interior is Solid. 767 
_ caster and Clearport ; Pickaway county—Tarlton ; Ross county— 
Adelphi, Hallsville and throughout Green, Union, Concord and 
_ Buckskin townships; Highland county—in Paint and Northern 
_ Marshall townships ; Adams county—the vicinity of Winchester, 
_ Kentucky—in the vicinity of Carthage, Burlington and Woolpers 
| reek. 
_ Figure 10 shows more distinctly the relation of the glacial 
a limit to the Ohio river at Cincinnati, producing the supposed ice 
_ dam discussed in a previous number of the NATURALIST (see Vol. 
xvm, June, 1884, pp. 563-567), and the line across Indiana traced 
q by me last summer. The northern part of Dearborn, the whole 
T of Ripley, Decatur, Jennings and Bartholomew counties are 
deeply covered with true glacial drift, and the extreme limit is 
‘Pretty easily ascertained, though the deposits in Jefferson, Clark 
and Scott counties are scanty as compared with the counties far- 
‘ther north. The highest point of the State is in Brown county, 
_ 150 feet above the sea. The ice deposits do not reach to that 
Point, but are very deep and extensive a few miles north over the 
_ Southern part of Johnson county. In Owen county there are 
a numerous striæ running 50° east of south, or nearly at right 
angles to the glacial limit. The glacial deposits in Southwestern 
4 are covered with “loess,” which is doubtless a water 
- kposit, and will, to the westward, probably greatly increase the 
“tie lty of tracing the exact southern boundary of the glaciated 
>i :0: 
ON THE EVIDENCE THAT THE EARTH'S INTERIOR 
IS SOLID. 
BY DR. M. E. WADSWORTH. 
(Continued from page 686, Fuly number.) 
Conclusions Starting with the common belief that the earth 
ence an intensely hot gaseous body, it follows that when 
from a gaseous to a liquid state, convection would cause 
gling of all the liquid portions only so long as the 
Kept every part at the same density. As soon as an espe- 
diference in density manifested itself (if it had not already 
one the gaseous state) the heavier materials would sink 
S the interior and the lighter pass outward towards the 
* So soon as these materials became viscous the inter- 
