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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Science Interactive Packs: Ocean
The Teacher Store 
Science Interactive Packs: Ocean
Our new Science Interactive Packs are helpful teaching tools to complement your curriculum. The Ocean Pack contains: Our new Science Interactive Packs are helpful teaching tools to complement your curriculum. The Ocean Pack contains:
- Big Book
- - Commotion in the Ocean
- Little Books
- - Commotion in the Ocean
- Posters
- - What Is the Ocean?
- - Is a Dolphin a Fish?
- - How Can You Describe a Shark?
Supplementary Collection | Grades Pre-K-1
Grades Pre-K-1 $29.95
- Big Book
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Hook, Line & Seeker
The Teacher Store 
Hook, Line & Seeker
This handbook to fishing, boating, and water wildlife brings together Jim Arnosky's knowledge, skills, and talents in one wonderful package. Illustrated with his trademark watercolors, pen-and-ink drawings, and photographs, it is packed with information. Both the text and the art give directions and advice.
$14.95
Paperback Book | Grades 4-7
Grades 4-7 $14.95
LESSON PLAN
UNIT PLAN
