TIL of a machine lubricant called Thames Mud Butter, made from fats that were skimmed from the sewage effluent of late 19th century London. (thamesfestivaltrust.org)
What does the past smell like? Explore a unique part of London’s heritage through the sense of smell.
![](https://kbin.life/media/cache/resolve/entry_thumb/26/01/2601252f1558f66c7248abdc7bf560defd0fbe120b97196c41c5ca73dfa1c696.jpg)