Exe0.2 Eric Snodgrass

Defer, defer.

Antoine-Augstin Cournot's 1838 scissor diagram, part of a series of what are thought to be the first recorded uses in economics of geometrically plotted supply and demand curve analysis, image from Thomas Humphrey, "Marshallian Cross Diagrams and Their Uses before Alfred Marshall: The Origins of Supply and Demand Geometry", 1992, p.5

YoHa, Invisible Airs, "pneumatic contraptions"