50 Transactions of the Academy of Science of St. Louis 
PHYSIOGRAPHY 
The physiography of the Ozark Province was analyzed by 
two methods: first qualitatively, to emphasize recognized physical 
divisions, and second, quantitatively, to represent objectively the 
essential characters of the features. A comparison of Figures 
6, 7, 8, and 9 show that boundaries determined quantitatively 
do not necessarily correspond to those on qualitative bases. Finer 
graduation of the relief and per cent slope scales would permit 
quantitative expression of observed boundaries, but would yield 
excessive detail. 
The qualitative map, Figure 6, was constructed from data 
obtained by an automobile traverse which crossed and recrossed 
the Ozark Province. A comparison of this map with Figure 3, 
after Sauer, reveals many points of similarity. Furthermore, 
the regions shown on both maps resemble rather closely the geo- 
logic regions, Figure 5, thus emphasizing the close relation be- 
tween geology and topography. 
In constructing the quantitative maps, the method used suc- 
cessfully by Smith for Ohio'® was found unsuitable because of 
topographic diversity. Local relief and average slope vary in- 
dependently from one area to another; hence, both factors must 
be mapped. A method was devised which accomplishes this and 
which also adapts itself to different topographic textures. 
Local relief was mapped as follows: 
1. On all published topographic sheets for the area the 
relief of each hill was measured from the sunmymit to the lowest 
point of contact of the slope and a bounding drainage line or level 
lowland. 
2. The values were recorded on the topographic maps, and 
18. Guy Harold Smith: “ : : : 
Vol. 25, 1935, pp. ag Relative Relief of Ohio, Geogr. Rev 
