240 
THE GRAND CANON DISTRICT. 
urements of Professor PoAvell, shows the varying declivity of the major 
portions, and the accompanying profile represents them graphically. 
Sululivisions. 
Distance 
in miles. 
Total fall 
in feet. 
Fall per 
mile. 
9.6 
60 
6.25 
58 
700 
12. 07 
47.6 
240 
5.01 
19.2 
100 
5. 21 
84 
540 
6. 43 
218.4 
1, 640 
7. 56 
Moreover, the fall is very unequal in the various parts of the subdivi- 
sions of the foregoing table, in which the fall for each division is averaged 
without exhibiting the true profile in detail. The following table represents 
a nearer approximation to the real variations of declivity. In this table the 
entire length of the canon is subdivided without reference to the individual 
plateaus, but in such manner as to embody portions of greater or less 
length, in each of which the declivity is not greatly varied. The numbers 
in the first column represent portions delineated in the accompanying pro- 
file and designated in the drawing by corresponding figures. In this table 
the Marble Canon is included. 
Distance 
in miles. 
Fall in 
feet. 
Fall in feet 
per mile. 
65.2 
510 
No. 2. From Little Colorado to the granite 
18.2 
no 
6. 04 
No. 3. Granite Falls on Kaibal) 
10 
210 
21 
No. 4. In the granite to Powell’s Plateau 
26.4 
320 
12. 13 
No. 5. Around western base of Powell’s Plateau 
10.8 
100 
9. 26 
No. C. Head of Kanab Division 
4.8 
50 
10. 42 
No. 7. Main Kanab and Hinkaret Division 
65.2 
310 
4. 75 
No. 8. Slicavwits Division to granite 
12 
70 
5. 83 
No. 9. Granite to Diamond Creek 
18 
210 
11. 66 
No. 10. Granite below Diamond Creek 
7.2 
25 
3. 47 
No. 11. Granite below Diamond Creek 
10.8 
100 
9. 26 
No. 12. From the Sheavwits granite to the end at Grand 'Wash. 
35 
175 
5 
283. fi 
2, 190 
7. 72 
The foregoing table is the nearest approximation to the profile which 
the barometric measurements hitherto made enable us to furnish. But it 
by no means gives the true profile in detail. It still remains to give a 
\ erbal and general account of it. The entire extent of the river within 
