Adjusting various constituent gears for predicting tide at a specific location
on the surface of the earth. Tide-prediction machine No. 2, "Old Brass Brains."
Image ID: cgs01642, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Washington, D.C.
Photo Date: 1939 Circa
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
| NOAA Disclaimer
July 7, 2015