1881. 61 Trans. N. Y. Ac. Scz. 
phates, which contrast with the iron-stained limestone, giving rise to 
the beautiful effects that have conferred celebrity on the opening known 
as the Star Chamber, and the myriad rock flowers of Cleveland’s 
Cabinet. 
uforize wal Projection. 
Tie 2 
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VUrrtrenl Page tho we 
The structure of the pits and domes was then illustrated with the aid. 
of the accompanying map, by describing a journey through the cave. 
From the hotel, (a, figures 1 and 2,) the visitor walks to its mouth (4), 
by the side of a shallow ravine, terminating in what was formerly a 
large sink-hole. The door of this fell through, about seventy years 
ago, producing the present mouth of the cave, and cutting off part of 
the gallery, now known as Dixon’s cave (c¢), which opens out near the 
Green river, a half mile distant. A walk of 1000 yards brings him to 
the Great Rotunda (d@), about 170 feet in diameter and too feet high. 
It is immediately under the hotel, its roof being not more than 40 or 50 
feet from the surface. Besides the gallery, called the Narrows (4’), by 
which access has just been obtained, another tunnel from the further 
side terminates in the Rotunda, to which the name of Audubon’s 
avenue (4") has been given. The large, almost hemispherical opening, 
seems to have been cut out by the meeting of nearly opposite streams 
of water, which found exit, probably, through the main cave (e). At 
some distance within Audubon’s avenue, a small opening in the floor is 
found, connecting it withthe roof of the Mammoth Dome, a vast cavern, 
