Some locomotives have an additional pressure gauge in the steam chest.
From the en.wikipedia.org
The adjustable valve comprised a disk covering a small hole at the top of the boiler above the water level in the steam chest.
From the en.wikipedia.org
Inside each steam chest is a sliding valve that distributes the steam via ports that connect the steam chest to the ends of the cylinder space.
From the en.wikipedia.org
They'd steam about four carloads at a time, which is about 20 bushels to a car, and pull them out of the steam chest and throw them up on the tables, where the women could get to them.
From the newsobserver.com
A spray of Photoshopped steam covering up the girl's chest.
From the huffingtonpost.com
Having a hot steam iron pressed against the chest is perhaps not the way any of us would choose to leave this life.