Showing how line of sight clears recorder with inclined tripod.
Mechanized leveling with velocipede.
Party of J. D. Crichton
Image ID: theb1762, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1920
Credit: C&GS Season's Report Crichton 1920
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
NOAA Central Library
| NOAA Disclaimer
May 12, 2014