. Animal activities : a first book in zoölogy. Zoology; Animal behavior. Fig. 5.—a Water-snail {Planorbis).. Fig. 6.—Shell of a Fresh-water Mussel {Anodon). growing plants enough in the aquarium to take up the carbon dioxide gas exhaled by the animals, and at the same time to give the water a supply of oxygen. Such plants may be easily collected while looking for snails. Water-plants are also for sale at bird Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may

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. Animal activities : a first book in zoölogy. Zoology; Animal behavior. Fig. 5.—a Water-snail {Planorbis).. Fig. 6.—Shell of a Fresh-water Mussel {Anodon). growing plants enough in the aquarium to take up the carbon dioxide gas exhaled by the animals, and at the same time to give the water a supply of oxygen. Such plants may be easily collected while looking for snails. Water-plants are also for sale at bird Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original French, Nathaniel S. (Nathaniel Stowers), 1854-. New York ; London : Longmans, Green, and Co.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjecta, booksubjectzoology