I meant to include this link-- https://en.wikipedia.org/wiki/Marine_steam_engine The engines on the draft he piloted would have been those of the 1850's. DDD On Sun, Mar 15, 2020 at 9:10 PM Dave Davis <[log in to unmask]> wrote: > Did Twain ever write about the specifics of the engines he would have been > familiar with? I seem to remember a mention of a "Corliss" engine, but I > don't know where in the corpus that might have been. > > Has anyone done a paper about this (slightly technical-- he was the pilot, > not an engineer...) topic? > > DDD >