Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 30
Life Growth Frogs 11 … A Frog. but as an air-sac to make him float like a bubble in thewater. Will he rise to the surface ? he inflates the air-bladder. Will he sink to the bottom ? he compresses theair-bladder.But in the frogthe air-bladderchanges intothe lungs, andis never thedelicate bal-loon whichfloats the fish in…
Children's literature
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