Muir, John, on the wonderful team work of the snowflakes, in the Ice Age, [37];
on the liveliness of mountain streams after a little nap in mountain lakes, [80];
on the winter sleep of the mountain lakes and their glad awakening in the spring, [198]
Natural bridges, various ways in which they are made by the very streams they bridge, [83], [85]
Nebular Hypothesis, one of the theories as to how the world was made, [4];
how it differs from the latest theory, [6];
the Bible story compared with both theories, [17]
Neptune (planet), [6]
New England, how the Old Men of the Mountain plowed its farms away, [31];
and then made up for it by putting in New England's waterfalls, [32]
Newton, his connection with the theory of the origin of worlds, [4]
New York City, what one of its big rocks tells about marble making, [97];
what its harbor owes to the engineering of the sea, [221], [222];
the perched boulder in Bronx Park and its autograph, [250]
Niagara Falls, its thousand-year clock and what it tells about the Ice Age, [35];
how the Old Men of the Mountain set the falls up in business, [36]
Nitrogen, how it helped to make fresh air for the new-born world, [16]
Norway, interpretation of the handwriting on the walls of its fiords, [254]