On 2020-07-21, Joshua Snow wrote:


"Andy Burns" wrote in message
...
newshound wrote:

https://www.theguardian.com/science/...e_iOSApp_Other

The glass things look like brewing airlocks ...

Dunno, hard to see how they attach to whats used
for the brewing or why the top one is so convoluted.


https://en.wikipedia.org/wiki/Geissler_tube

--
Ian

"Tamahome!!!" - "Miaka!!!"