The water on one’s body is absorbed in the tiny spaces between the fibres of the towel in the same way as ink is taken up by the blotting paper.
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The water on one’s body is absorbed in the tiny spaces between the fibres of the towel in the same way as ink is taken up by the blotting paper.
The Apteryx, or, as the natives call it, the Kiwi, is a peculiar bird with hardly any trace of wings. Found in New Zealand, where it was formerly very common, though now it is seen more rarely, it has a very long beak with nostrils...
A particular kind of bird always produces the same kind of colour in its eggs, first as it produces a particular kind of colour in its feathers. This is a result of the particular chemistry of the body of the bird. The difference in colour...
Through this hole enters the air which we blow out of the nozzle. When we part the handles, thereby opening the bellows, the air rushes in through the hole and when we bring the handles together, and so close the sides of the bellows, the...
The bee’s humming is made by the movement of its wings. Its wings move very quickly and as they move to and fro they set the air moving and it is the waves in the air that make them hum. The vibrations in the air...
No; flower contains honey as we know it; sugary material produced by the flower is not honey. Honey is a thing specially made by the honey-bee from materials derived from the flower. In fact, the sugary substance, produced by the flower through a long and...
No matter whether a ball is solid or hollow, its bounce is due to the fact that it is elastic. This simply means that when the ball is pressed out of its shape it tends to return to the shape it had at first. The...
More work can be obtained from an axe with a curved handle. The shape of a half-strung bow renders the handle stronger and less likely to snap when in use. The double curve gives it added flexibility. Then the curved handle enables the increases, axe...
The motion of the arrow through the air is a kind of power, and that, like all other power, has to come from somewhere, from the stretching of the bow. When the cord and the bow are bent out of their normal shape by being...
Animals and birds are all in some degree sensitive to the coming changes in the weather. By observing their movement, warning of coming storms can be obtained. Sea birds are good barometers. As stormy weather approaches, they leave the water and fly inland in search...