Page images
PDF
EPUB
[graphic]

Nature's method of conservation of water by storage. Lake Tahoe, in the Sierra Nevada on the boundary between California and Nevada, typical of the mountain lakes whose storage capacity can be increased at relatively small cost.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small]
[merged small][merged small][merged small][merged small][ocr errors][merged small]
« PreviousContinue »