LaRue "Tex" Wells and Scott Nelson hold a bathythermograph
![LaRue "Tex" Wells and Scott Nelson hold a bathythermograph](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Tex_and_Scott.jpg?itok=3CjAfoOo)
Detailed Description
Retired and current USGS scientists from the Great Lakes Science Center display a bathythermograph. The device was invented in the early 1900s and collected temperature information in the Great Lakes up until the 1990s.
Sources/Usage
Public Domain.