Photograph of a worker refueling a "Caterpiller" Sixty snow plow in Sequoia National Park, 1931. The plow stands is parked in the snow at center with a wave of snow caught in the bide blade in front. A man wearing work boots and gloves stands on the side of the plow holding the long gasoline tube which extends from the wooden station on the left. A massive tree stands on the right with relatively thin trees standing over the snow in the background. Photoprint reads: "Received from Doyle. In beautiful Sequoia National Park, California, this 'Caterpillar' Sixty equipped with back filler blade is engaged in clearing snow from the roadways. Here the Sixty takes on gasoline at a park station".