I've always wondered where the oil is going in this photo. The oil filler is towards the back in the center.
I remember back in the day people paying a lot of money for a set of encyclopedias. It seemed every house had a set of them. After my in-laws passed we ended up with a set of those books which they paid per month on and were sent through the mail to them. They sat on a shelf in my basement for twenty years and the only way I could get rid of them was to put one in the recycle bin every week till they were gone.