Bathysphere
Dr. William Beebe and John T. Vann, an associate, right, arrive in 1934 with his Bathysphere. (AP Photo)
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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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.
$4.95
Paperback Book | Grades 3-5
Grades 3-5 $4.95
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Look What Came from Egypt
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Look What Came from Egypt
Each book in this elementary-level series explores, in a very simple fashion, the foods, words, inventions, toys, games and sports, religion, music, and crafts that a specific country has contributed to the world.
$6.95
Paperback Book | Grades K-3
Grades K-3 $6.95
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