elbert,
you're talking about
waterhouse stops, which predate the adjustable aperture by a long time. I shoot landscapes with a woody[1], an 8x10
view camera by Gundlach Korona. Maintaining the camera requires wood polish and mink oil. One of my prize possessions is the 250mm wide angle lens on the camera, the legendary 10" Wide Field Ektar by Eastman Kodak, c.1947.
Dan
Note 1. Wooden cameras are often called "furniture" by their fans, or "kindling" by their detractors.