Hi. Fascinating reading. My own profession (art conservation) has used ether for a variety of treatments in the past. We were always warned that diethyl ether has a flame trail or flash back capability of nearly 35 feet. That is an open flame or ignition source 35 feet away from an open can of ether will cause it to ignite. Kind of scary.
Some of the early treatments involved refluxing archaeological artefacts in a bath of boiling/distilling ether. In glass no less.
Well, back to setting up my wet plate equipment/chemicals.