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surface moving faster than the lower strata, thus producing the curved 
position of the dikes and rounded edges on one side and the acute angles 
on the other side of the dikes, where they join the main body of clay. 
I do not recall any “pockets” of sand in the clay in this trench, but 
at that time I probably should have given little attention to them had 
they been there, and this may be an instance of “‘seeing without perceiv- 
ing,” but the facts above stated clearly indicate that frozen sand may be 
expected to act as other rocks act under like conditions. 
No surprise would be occasioned by finding a sandstone boulder raised 
from its bed and incorporated in the drift clay. The grains of sand may 
be united as firmly by congealed moisture as by some of the cements that 
unite the grains of sandstone, and therefore, if it be conceded that frozen 
sand may be overridden by advancing ice, it is not unreasonable to con- 
clude that masses of the frozen sand might be detached from the main 
body and raised and incorporated in the drift in the same manner. 
THE Capy MarsH. By T. H. BAtt. 
Among the physical features of Lake County, Indiana, of interest to 
the scientific observer is one known as the Cady Marsh. It covers mainly 
what are now sections 28, 29 and 30, in township 36, range 8, west, and 
sections 25, 26, 27, 28, 29 and 30, in range 9, west, also in township 36. 
It is now crossed by the Chicago & Erie Railway, and, in part, by the 
Grand Trunk. Three wagon roads now cross it, and one large ditch, the 
Hart Ditch, cuts its western expansion. 
It was originally, that is, sixty-three years ago, when it was first seen 
by the white settlers, covered with water. It was considered dangerous 
for a man to undertake to cross it on horseback. 
It lies between two of the great sand ridges of Lake County. These 
two ridges coming together some five miles from the east line of the 
county, define its eastern limit, and as the northern ridge runs nearly west 
into Illinois and the southern passes south of west also into the State of 
Illinois, the western expansion of this marsh joins with other lowland’ 
which on an early map of Indiana was called Lake George. The water in 
that so-called lake is said to have been from about two to seven feet in 
depth. This early Lake George has been drained by the great Hart Ditch, 
which passes from Dyer on the State line, and running a little east of 
Se 
