The Different Connection Of Particles

: Fables For Children, Stories For Children, Natural Science Stori

Why are cart bolsters cut and wheel naves turned not from oak, but from

birch? Bolsters and naves have to be strong, and oak is not more

expensive than birch.

Because oak splits lengthwise, and birch does not split, but ravels out.

Because, though oak is more firmly connected than birch, it is connected

in such a way that it splits lengthwise, while birch does not.

Why are wheels and runners bent from oak and elm, and not from birch and


Because, when oak and elm are steamed in a bath, they bend and do not

break, while birch and linden ravel in every direction.

This is again for the same reason, that is, that the particles of the

wood in the oak and in the birch are differently connected.