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Worms kept in a warm room drew 63 triangles into their burrows; but, as in the case of the pine-leaves, they worked in a rather careless manner, for only 44 per cent. were drawn in by the apex, 22 per cent. by the middle, and 33 per cent. by the base. In five cases, two triangles were drawn into the same burrow.
Worms often remain, as formerly stated, for a long time close to the mouths of their burrows, apparently for warmth; and the basket-like structures formed of leaves would keep their bodies from coming into close contact with the cold damp earth. That they habitually rested on the pine-leaves, was rendered probable by their clean and almost polished surfaces.
I was constantly at my post; and many a one crept round to me from the quarters and made his way through the graves and the trees to where I sat by the iron railing. We were safe there. Nobody but me liked the place. Miss Pinshon and the overseer agreed in shunning it. And there was promise in the blue sky, and hope in the soft sunshine, and sympathy in the sweet rustle of the pine-leaves.
We may therefore infer that it is not the divergence of the two needles which leads worms in a state of nature almost invariably to drag pine-leaves into their burrows by the base. Nor can it be the sharpness of the points of the needles which determines them; for, as we have seen, many leaves with the points cut off were drawn in by their bases.
A few bush-huts near by served as stores, boardinghouses, and for sleeping; but all hands slept on the ground, with pine-leaves and blankets for bedding. As soon as the news spread that the Governor was there, persons came to see us, and volunteered all kinds of information, illustrating it by samples of the gold, which was of a uniform kind, "scale-gold," bright and beautiful.
Blushing from under the pine-leaves, Soon they will greet me anew, But still, oh, my beautiful violets, I'll be watching and longing for you.
Accordingly, pine-leaves were scattered on the ground in places far removed from any pine-tree, and 90 of them were drawn into the burrows by their bases. Only two were drawn in by the tips of the needles, and these were not real exceptions, as one was drawn in for a very short distance, and the two needles of the other cohered.
Glass beads and bits of tile, which had been strewed on the surface of the soil, were stuck into the interstices between the pine-leaves; and these interstices were likewise plastered with the viscid castings voided by the worms. The structures thus formed cohered so well, that I succeeded in removing one with only a little earth adhering to it.
In order, therefore, that worms should do their work well, they must drag pine-leaves into their burrows by their bases, where the two needles are conjoined. But how they are guided in this work is a perplexing question.
In the case of pine-leaves worms plainly show that they at least do not seize the leaf by chance; but their choice does not appear to be determined by the divergence of the two needles, and the consequent advantage or necessity of drawing them into their burrows by the base.