Ski there was a section of that video that had a big influence on my life. My grandfather was a chemical engineer working for the Wabash RR. His job was to reduce foaming in the boiler which was a major cause of corrosion. I have a picture of him riding on the top a locomotive filming the boiler action through a window in the steam dome.
As a result of his work he started his own company which I believe was the Electrical Chemical Corp and developed the foam meter shown in the video. This meter detected foam in the boiler and signaled the engineer when to blow it off. In the late 30's he sold the company and moved from North Park Illinois to San Clemente Ca. As a result I grew up on the beaches of San Clemente instead of the streets of Chicago. Thank you Grandpa!