“The gears or ‘cogwheels’ are for running the fan, the pump and other parts.” -Bodmer, 1917
Rudolph J. Bodmer, ed. The Book of Wonders (Washington, DC: Bureau of Industrial Education, Inc., 1917)
2400×1332, 621.0 KiB
1024×568, 69.2 KiB
640×355, 40.1 KiB
320×177, 14.8 KiB