Finally found the secret.
 

Interesting,
Phlogistine used to be considered an element that
was tangible,limited and measureable.
The 'element' of Fire .
 
cool stuff (well..it probably burns a little actually  )
 
Still unrivalled! (pun intended)

What . . . . you guys didn't know that's what they dip / pot the pickups with?  Really . . . . ?
 
J o e y

Phlogistine---alchemy term for oxygen..
Always wondered  why my fingers go so fast when I am near the PU's LOL