Collections in the Geological Hall. 
The collections exhibited in this hall consist of fossil organic 
remains from the rocks of the different geological formations 
represented in America, together with rock specimens and speci- 
mens illustrating different phenomenal features. These objects 
are arranged in the cases chronologically, i. e., according to 
geological time, beginning at the northeast corner of the room 
with the oldest or lowest formations, and passing around the room 
from left to right, thus passing from the lower or oldest to the 
higher or newer beds ; the organic remains under each division 
being those found in the formation indicated by the large label 
in the top of the case. The cases are lettered and numbered, the 
letter being under the gas bracket at the end of the case, and the 
panels numbered over the door. 
