The surrounding hills rise
abruptly from the water to the height of forty to eighty feet,
though on the southeast and east they attain to about one hundred
and one hundred and fifty feet respectively, within a quarter and a
third of a mile. They are exclusively woodland. All our Concord
waters have two colors at least; one when viewed at a distance, and
another, more proper, close at hand. The first depends more on the
light, and follows the sky. In clear weather, in summer, they
appear blue at a little distance, especially if agitated, and at a
great distance all appear alike. In stormy weather they are
sometimes of a dark slate-color. The sea, however, is said to be
blue one day and green another without any perceptible change in the
atmosphere. I have seen our river, when, the landscape being
covered with snow, both water and ice were almost as green as grass.
Some consider blue "to be the color of pure water, whether liquid or
solid." But, looking directly down into our waters from a boat,
they are seen to be of very different colors.
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