is everywhere in progress, the scene, in the depth of the pri- 
meval forest, creates quite an imposing impression. Hapury is 
considered already in the district of Alta Acre and from this 
point, the difficulty of navigation increases, the breadth and 
volume of water of the river alike decreasing. Very rapidly 
during long, rainless periods, the river water level lowers and 
the further progress of the steamers becomes impossible. They 
must anchor at a convenient place and wait until the river rises 
again. In lower Acre, where water is more plentiful, such in- 
terruptions are less frequent, but in upper Acre they are the rule. 
The farther the river is ascended the more frequent are these 
compulsory stoppages, often lasting eight to fourteen days. High- 
water in the river often lasts but a few days, so that the steam- 
ers must stop again. Then too, the many windings of the river 
make navigation exceedingly difficult. On the upper Acre travel 
is by day only, boats laying to at night. 
Following the course of the river, 85 kilometers above Ha- 
pury, Igarapé de Bahia is reached, on the Bolivian border and 
then the little town of Cobija. It is situated on the right bank 
and belongs to Bolivia, whereas on the left bank, Brazilian terri- 
tory continues. The steamers here are subject to the Bolivian 
customs regulations and must pay duty on all goods destined 
for Bolivia. 
A large number of the steamers that start from Mandaos, go 
only as far as this or as Hapury, only a few venture to penetrate 
further and are not deterred by the great loss of time. 
Above Cobija are some of the most productive rubber sec- 
tions where there are goods to discharge and rubber to be loaded. 
A few steamers follow the Bolivian border up to the terminal 
station, Tacna. Here, as a small affluent from the right, the 
Taverija flows into the Acre, forming at the same time the 
boundary between Bolivia and Peru. 
Bolivia maintains here a small military post, whereas there 
is only a commissioner for Peru. If the steamer has met with 
favorable conditions, the trip from Manaos may have been made 
in a month; ordinarily, however, it takes two or three months. 
The return trip is made much faster, some steamers, that do 
not stop, make Manaos from upper Acre in fourteen days. 
Above Tacna there are but two rubber forest districts or 
seringaes as they are termed, the Seringal Auristella on the 
Peruvian side and the Seringal St. Francisco on the Brazilian 
side. The latter is a very productive and still young rubber 
forest, farther up the river the fine rubber trees suddenly cease 
and their output is no longer remunerative. 
The climate, like that of the Amazon country, is humid and 
hot, with a’ rainy and a dry season. The southerly situation, 
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