Logo
Prev
Bookmark
Rotate
Print
Next
Contents
All Pages
Related Articles
Browse Issues
Help
Search
Home
'
National Geographic : 1979 Nov
Contents
Respirometer, measuring oxygen use by mussels, rests on the bottom. Alvin's claw drops specimens into its four chambers (page 694). Television camera Collecting panels, made of slate to mimic the seafloor, were left on the bottom in January to be retrieved in November. The rates of settlement of larvae at different heights from the bottom will aid studies of colonization. Strobe Remote-controlled light manipulator arm / Claw Equipment tray carries traps, corers, nets, and samplers, such as a slurp gun to vacuum up fragile animals. Bacteria sampler Stereo camera takes 35-mm slides that permit precise measurements of size and distance; temperature probe at left records variations as subtle as .002°C. Vacuum sampler Clam bucket Mud grab: Guided by the sub pilot, the claw places the tool outside the rocky vent area. A later twist of the T-bar handle takes up a sample of sediment to be screened for organisms. CCD camera (page 705) displays images on a screen in the sub where biologists watch close-ups, such as a crab scraping food. A/vin's many hands Scientists design tools that can be maneuvered by Alvin's two arms. An adjustable claw reaches out to grab rocks or collect delicate animals. Water sampler consists of two plastic bags around metal fingers; Alvin's claw trips a release that snaps the fingers open to take uncontaminated water for bacterial analysis. Acoustic velocity meter measures the speed and volume of water coming from vents. DRAWINGBY DOROTHYMICHELENOVICE ANDJANEWOLFE;COMPILEDBY ROSSM. EMERSON NATIONALGEOGRAPHICARTDIVISION Current meter. Floodlights * w
Links
Archive
1979 Dec
1979 Oct
Navigation
Previous Page
Next Page