May Farinholt Jones, Keep-Well Stories for Little Folks
“ I want to tell you of another engine that is very like the steam engine. It too must have fuel before it can run or work. It is unlike the steam engine in as much as it grows all the time, and it does not need to have an extra man to put the fuel into it. You must think of your body as an engine and remember that it needs fuel to run it. The fuel that makes the body-engine move and work is the food you eat. ”
