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1 we owe a lot to the birds and beasts eat insects. But all of them put together kill only a fraction of the number destoryed by spiders.
2 one can tell the difference almost at glance, for a spider always has eight legs and insect never more than six.
3 it is impossible to make more than the wildest guess at how many they kill, but they are hungry creatures not content with only three meals a day. |
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