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  • Description: snails
(2 results)



Display: 20

    • Collecting mud

    • Guadalupe River Project Victoria, Texas
    • Mud from bottom is collected in dredge, rear, then washed in trays so scientists can study worms and snails living in the stream bed. They show first effects of any pollution. An incinerator and evaporation basins were built and two mile deep wells...
    • Determining river flow

    • Guadalupe River Project Victoria, Texas
    • River's flow is determined by meter that sounds 'ping' in scientist's ear as tiny cups revolve. The scientists collected hundreds of species of fish, clams, insects, snails and plants living in and along the Guadalupe River.

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