108 THE MAMMOTH CAVE. 
ten feet from the floor. It closely resembles the 
object after which it is named. 
5. Boonr’s AVENUE leads off to the left. It 
has been explored only about one mile, and 
nothing further is known as to its extent or 
dimensions. 
6. Cortnna’s Dome rests directly over the 
center of the avenue. It is forty feet high and 
nine wide. It was formed by the solvent action 
of water, which entered it through a fissure at 
the top, when the Pass of El Ghor was filled 
with water. Had it been formed after the 
water had left the avenue, there would have 
been a pit beneath it, as at Shelby’s Dome 
and the Bottomless Pit. 
7. Tue Brack Hore or Catcurta is situated 
on the left side of the avenue, and is about ° 
fifteen feet deep. 
8. STELLA’S Dome is two hundred and fifty 
feet in height, and, in general appearance, re- 
sembles Lucy’s Dome. It is reached by passing 
through a small avenue which enters the left 
wall of the Pass of El Ghor. 
9. ‘THE CHIMES consist of depending rocks, as 
in the Bacon Chamber, which, when struck, 
emit a musical sound. These are objects of 
interest to the visitor. 
