Truck and trailer of the gravity party.
The advent of trailers spelled the end of the great tent camps in the Lower 48.
Gravity party of Carl I. Aslakson
Image ID: theb2597, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1937
Credit: Association of Commissioned Officers
Category: Geodesy/Camping Out/General/
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
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