Night time. Old man is going out, going to have to remember to bring in the vacuum pump for when he gets back and wants to lock the shed up (I've lent it him so he can use it when he wants to pot transformer coils in epoxy, to make sure the wires are thoroughly impregnated in a vacuum chamber he's built. But the pump itself, is mine, I just have no objection to his using it, so long as it doesn't suffer any damage, because of course, any lab needs a good vac pump, it makes filtration of awkwardly fine products or impurities that need collecting or separating off from a liquid phase etc. take minutes rather than hours, and stripping solvents without heat is makes light and fast work of what might otherwise take many hours, not to mention dessicating things in vacuo to rid them of the last solvent or H2O present, or to degass solvents about to be used to dissolve things that really don't take kindly to air.)
And there are many, many compounds I've made or worked with that need purification but decompose before they distill at 1atm.
