Considering in the 1920s the US was in the middle of converting horse drawn street cars into electric, and this is an application for EDISON, I certainly hope y

Considering in the 1920s the US was in the middle of converting horse drawn street cars into electric, and this is an application for EDISON, I certainly hope you would know that answer. Kerosene was the most important fuel used up until the 1920s, so I'd imagine most people would have seen kerosene barrels personally. A few would have derived the type of wood via curiosity.