The Boston Museum of Science has a 1906 Rollins steam engine in its basement [0]. It used to be powered from the Boston steam system, turning about once every f

The Boston Museum of Science has a 1906 Rollins steam engine in its basement [0]. It used to be powered from the Boston steam system, turning about once every five seconds (which was about a tenth of its rated speed). Unfortunately, at some point the steam supply switched to a lower pressure, and it was no longer enough to keep the engine turning. [0]: https://commons.wikimedia.org/wiki/File:Museum_of_Science,_Boston,_MA_-_IMG_3199.JPG https://commons.wikimedia.org/wiki/File:Museum_of_Science,_B...