Steam engines and tractors are a prominent feature in the Pazandak
photograph collection. The images, if seen in a chronological sequence,
show the evolution in farm power. First, large steam engines were
developed which were fairly limited in their applications. Primarily,
they were used for heavy hauling, plowing, and operating a threshing
machine. They soon were followed by tractors which were used for the general field work of plowing,
disking, seeding, binding, as well as providing power to the threshing
machine. Presented here are technical descriptions of the tractors
and steam engines which appear in the Pazandak collection. For a brief
history of the companies which manufactured the following tractors
or steam engines, see the section entitled "Farm Machinery Companies."
For a brief description of the processes or implements used with the
tractors or steam engines, see the section entitled
"Implements Used on the Farm."