THE MAMMOTH CAVE. 151 



Avenue to Clarissa's Dome, and is about three 

 hundred yards in length. This avenue con- 

 tains a number of ferruginous logs, which vary 

 from five to fifteen inches in diameter. Some 

 of them appear to be chopped in half; others 

 have lost a portion of bark, displaying a white 

 surface of petrous wood ; and others again look 

 as though they were in a state of partial decay. 

 Anywhere else these masses of stone might be 

 mistaken for petrified wood. 



Clarissa's Dome is entered at its base. It 

 resembles Gorin's Dome, but is much smaller. 



4. Bennett's Point is directly opposite Sylvan 

 Avenue, where the avenue turns at an acute 

 angle to the right. The floor of the avenue at 

 this point is covered with yellow sand. 



5. Bishop's Gorge is a low and narrow part 

 of the avenue, which is passed with difficulty. 



Sparks' Avenue is named in honor of Mr. 

 C. A. Sparks, of New York. 



The Mammotli Dome is viewed from a ter- 

 race about forty feet from its base. It is two 

 hundred and fifty feet in height, and in appear- 

 ance closely resembles Gorin's Dome, but is more 

 than five times as large. At the left extremity 

 of the dome there are five large pillars cut out of 

 the solid rock, called the Corinthian Columns. 



