1203. A cultivated valley in northern .lilcuaaor. A field of 
barley in the f oreground* Cultivated fields are carried up on 
the slopes of the mountains as far as praotioable^ sohietimes 
when the steepness woula seem to precluo.e culture, buch fields 
are worked by hand* 
1580* A river bed in the desert region of southern Bolivia, 
ear Atocha. The stones inclosed in heavy wire netting are 
sed to Drotect river banics against erosion in times of flood* 
