HYDROGRAPHIC REPORTS. 
97 
Leaving the Magare at daylight, a series of swift rapids served 
to bring us to the Angostura, a deep narrow passage, formed by 
a sharp bend running from N". N. E. to S. W., with clumps of 
dark slate projecting from either shore, upon which are traces 
of iron. Beyond this, at a distance of three miles, is the island 
of Capiango, from whence to the Cerro Encinal, the banks are 
more like those of the lower Coatzacoalcos, and the stream itself 
wider and deeper, but with frequent rapids and a marked de- 
pression in its bed. At the Encinal is another large island, and 
on the left bank nearly opposite a mule-road leading to San Juan 
Guichicovi. A mile below this, at a bend in the river running 
east and west, is a large milpa, belonging to the Indians of San 
Juan. From the mouth of the Malatengo, a distance of two 
miles, the banks of the river are low and the current stronger, 
with shoaler water, and a mixed bed of slate, limestone, sand- 
stone, clay stone, jasper, porphyry, and gruneisentein, all of which 
(with the exception of the latter) may be said to exist in a 
greater or less proportion from the Milagro. At the confluence 
of the Malatengo the river is spread over a broad space, and 
forms a triangular island, with a narrow passage, over a strong 
rapid, under the left bank. The Malatengo comes in at an angle 
of If. 56° W., and its mouth is much obstructed by rocks, which 
give it the appearance of a feeble and shallow stream. From 
this the river bends sharply to the eastward for some distance, 
and then assumes a northerly direction to beyond the Eio Chico, 
a small tributary on the right bank; after which its general 
course is H. K. W., until reaching the bend forming the rapid 
of Alto Mayor, the largest and most dangerous in the river. 
Here the fall is sixteen feet in two hundred, and the current not 
less than twelve miles per hour. It is passable, however, by a 
very narrow and turbulent channel on the left. Getting over 
the rapid, the water is from fourteen to sixteen feet deep, and the 
river one hundred and fifty feet wide. At this point an exten- 
sive saw-mill might be erected, at small expense, to supply the 
lumber necessary for the construction of works at Suchil or other 
points on the Coatzacoalcos. The upper regions of the Kio del 
Corte abound in pine, oak, and cypress of the finest quality, 
which in' two days might be floated by the current, even in the 
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