Little delights Thoreau more than watching rivulets of sand and clay “burst” and “overflow” through the snow in banks, such as those on the bank by the railroad. Seeing “the various shades of the sand”, “singularly rich and agreeable (1139), makes him feel as though he "stood in the laboratory of the Artist who made the world and me" (1139). Thoreau sees these little streams replicated in tree leaves, blood vessels, and ice crystals. In this way, the "hillside illustrated the principle of all the operations of Nature" (1141).
In this same section of “Spring”, Thoreau makes a