ARCHITECTURE OF ANTS. 4} 
What follows proves that the workman, 
on discovering his error, knew how to 
rectify it. 
A wall had been erected with the view 
of sustaining a vaulted ceiling, still in- 
complete, that had been projected from 
the wall of the opposite chamber. The 
workman who began constructing it, had 
given it too little elevation to meet the 
opposite partition upon which it was to 
rest. Had it been continued on the ori- 
ginal plan, it must infallibly have met the 
wall at about one-half of its height, and 
this it was necessary toavoid. ‘This state 
of things very forcibly claimed my atten- 
tion ; when one of the ants, arriving at 
the place, and visiting the works, appeared 
to be struck by the difficulty which pre- 
sented itself; but this it assoon obviated, 
by taking down the ceiling and raising 
the wall upon which it reposed. It then, 
in my presence, constructed a new ceiling 
with the fragments of the former one. 
When the ants commence any under- 
taking, one would suppose that they 
