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Caterpillar Tractors
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1.
Caterpillar tractors and donkey engine at loading site, with flatbed railroad log cars and shack in background, Simpson Logging Company camp no. 5, ca. 1940
2.
One of West Fork Logging Company's first Caterpillar tractors being unloaded from a flatbed railroad car, with Heisler locomotive in background, 1936
3.
Loading site with loading crane, bulldozer and Caterpillar tractors with arches and winches, Simpson Logging Company, probably in Mason County, n.d.
4.
Loading crew with loading crane and Caterpillar tractors with arches and winches for yarding logs, camp 3, Simpson Logging Company, near Shelton, ca. 1935
5.
Loading site with loading crane, bulldozer and Caterpillar tractors with arches and winches for yarding logs, Simpson Logging Company, probably in Mason County, n.d.
6.
Loading site with donkey engine and Caterpillar tractors fitted with yarding arches and winches, camp 1, Simpson Logging Company, Mason County, ca. 1927
7.
Loading site, with loading crane, bulldozer, and Caterpillar tractors with arches and winches for yarding logs, Simpson Logging Company, probably in Mason County, ca. 1940
8.
Loggers at loading site with Caterpillar tractors and arch yarders, Schafer Brothers Logging Company, probably in Grays Harbor County, ca. 1942
9.
Loggers using Caterpillar tractors and arch yarders, Schafer Brothers Logging Company, probably in Grays Harbor County, ca. 1942
10.
Caterpillars used by WPA in clearing the Grand Coulee Reservoir, ca. 1940
11.
Logger using Caterpillar tractor and arch yarder, Simpson Logging Company, camp no. 1, ca. 1925
12.
Logging crew at yarding operation using a Caterpillar tractor and log yoke, West Fork Logging Company, ca. 1939
13.
Loading site with caterpillar tractor fitted with winch, camp 3, Simpson Logging Company, near Shelton, ca. 1935
14.
Loggers with Caterpillar tractor fitted with yarding arches and winch, camp 5, Simpson Logging Co., Grays Harbor County, ca. 1940
15.
Crew and Caterpillar diesel tractor equipped with pipe layer sideboom engaged in construction of ALCANGO pipeline, between Haines and Fairbanks, August 2, 1954
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