APPENDIX. 
5. AVibtii of the Eiveb, Depth, aitd General Peopomton of the Slopes. 
1) Slope of tho MaiaorS between Exaltacioii and the mouth . 
2) ,, Madeira from tho mouth of the Mamor6 to Guajard 
3) ,, ,, Guajara to Santo Antonio 
4) ,, ,, Santo Antonio to the mouth 
Depth of the deepest Channel at Low Level. 
1) Mamore at the mouth (maximum) ...... 
2) ,, on the reef of Matucare (minimum) .... 
3) Madeira between the mouth of the Mamore and Guajara (maximum) 
4) _ ,, „ „ „ (minimum)' 
5) Beni at the mouth ........ 
6) Madeira, greatest deptli above Theotonio .... 
7) „ ,, at Sapucaia Oroca . . ... 
3) II OH the reefs of Uroa (shallowest part of the channel) . 
iridth of the Hh'crs. 
1 ) Mamore, at the mouth, at low water ..... 
,, II at high water ..... 
2) Guapore, at the mouth, at low water ..... 
,, ,, at high water ..... 
3) Madeira, average width above the rapids .... 
4) „ minimum of width within the rapids 
,, maximum ,, „ .... 
o) ,, below the rajiids at Sapucaia Oroca 
f>) Beni ........... 
6. Er.EV-ATIOX OF THE BaXKS — DIFFERENCE OF LeVEL BETWEEN HioH AND LoW 
Water — Q u.ANTmEs of Water. 
Near Exaltacion the banks of the Mamore rise on an average to 43 feet above 
low water level ; and this is also about the height of the floods ; but at its mouth tho 
shores rise only to about 26 feet, and ai’O inuiulated far and wide by the floods which 
there usually reach 30 feet in height. 
On the Madeira the elevation of tho banks varies considerably witliin the region 
of the rapids ; and so do the high and low water levels. Immediately above each 
rapid they sink to about 6^ to 10 feet ; immediately below they rise to a maximum. 
On tho Lower Madeira the normal elevation of the banks is 23 feet above low 
water, that is, a trifle less than high water level. At some places, however, as at 
Sapucaia Oroca, tlie difference between flood and low water level is 40 feet; tho 
elevation of tho right shore 43 feet, and that of the left 33 feet above low water. 
The quantities of water conveyed per second by the Madeira and its confluents at 
different levels are as follow : — 
1 
Low Water 
Medium Water 
F'iood 
1 
Level. 
Level. 
Level. 
1 
Cubic Feet. 
Cubic F'eet. 
Cubic Feet. 
Guapore, at the mouth .... 
23,415 
66,270 
180,818 
i ilainoro ...... 
29,500 
89,350 
248,060 
j Madeira, at the upper end of the rapids . 
52,900 
152,212 
428,876 
Beni, at the mouth .... 
48,842 
. 153,412 
463,000 
1 Madeira, below the rapids at Sapucaia Oroca 
146,278 
617,090 
1,351,065 
