735Aa0203: "Type of strainer used by Galen Evans of Nebraska on Browns place 1/2 mi east of school house, 4 miles east of Evans. 1 x 4 with spacers made of siding. 6' dia. 32' long"
Image also used as Figure 28 in "Putting Down and Developing Wells for Irrigation" by Carl Rohwer, which reads, "Galvanized-iron casing perforated with chisel slots."