39 
HALLS 60 AND 61. 
GEOGRAPHIC GEOLOGY, 
The purpose of the exhibit of this Division is to illustrate 
in a vivid and realistic way the surface configuration of the earth. 
The chief feature of the exhibit is a series of relief maps which 
reproduce on* as natural and representative scales as practicable, 
the topography and structure of selected portions of the earth’s 
surface. A part of the series show only topography and sculp- 
ture, while another part shows geological structure as well as 
topography. To some extent, the topography is shown on one 
map and the geological structure on another, so that both ele- 
ments are represented with the greatest distinctness. The portions 
of the surface selected to be represented are usually such as to 
portray some typical form of surface sculpturing or of volcanic 
accumulation. Some, however, represent natural or political 
divisions. 
In addition to the relief maps, there are models showing geo- 
logical structure or illustrating methods of development. Some of 
these are dissected so as to show the more intimate structure of 
the formations. The exhibit also contains a collection of globes, 
wall maps, portfolios, and other geographic material. The fol- 
lowing is a list of the principal features: 
Relief maps showing topography only. 
No. 1. Relief map of the World on Mercator’s Projection. 
Horizontal scale 630 miles to i inch. Vertical scale 78 times the 
horizontal. 
No, 2. Relief map of Europe. Horizontal scale 85 miles to 
I inch. Vertical scale 45 times the horizontal. 
No. 3 .— Relief map of Asia. Horizontal scale 216 miles to 
I inch. Vertical scale 39 times the horizontal. 
— Relief map of Africa. Horizontal scale 184 miles to 
I inch. Vertical scale 53 times the horizontal. 
No. 5. — Relief map of North America. Horizontal scale 
140 miles to i inch. Vertical scale 39 times the horizontal. 
No, 0, Relief map of South America. Horizontal scale 147 
miles to i inch. Vertical scale 30 times the horizontal. 
