bathysphere
Dr. William Beebe and John T. Vann, an associate, right, arrive in 1934 with his Bathysphere.
The bathysphere was the first modern system designed for the purpose of deep-sea exploration. Developed by American naturalist William Beebe and engineer Otis Barton in the early 1930s, it consisted of a steel sphere with windows of fused quartz and equipped with searchlights, an oxygen supply, and a telephone. The sphere had to be lowered and raised by cable from a ship, and no rescue was possible if the cable broke. The deepest descent made by Beebe and Barton, in 1934, was to 923 m (3,028 ft). Later versions of the bathysphere have been called benthoscopes.
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In 1492
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In 1492
by Jean Marzollo and Steve BjorkmanIn fourteen hundred ninety-two, Columbus sailed the ocean blue. Easy-to-remember, flowing couplets and humorous artwork will entertain and inform young readers.
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Paperback Book | Grades K-2
Grades K-2 $3.95
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Torres de luz
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Torres de luz
by Gail GibbonsA colorful and accurate explanation of lighthouses-their purpose, history, and variety-including drawings of existing lighthouses.
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Paperback Book | Grades 3-5
Grades 3-5 $4.95
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