Vintage Hand Made Tester Steam? Water? Rustic Wooden Tool Measurement.

No clue what it really is but looks cool. I got it at a auction in Amish country in Pennsylvania. They had a lot of Hit and Miss engines maybe it was used to test them some how?

There is a shaft that turns and pipe that swings down. There is a glass tube that connects to the main tube. Weights about 15 pounds. About 34 inches tall.