who the hell would make an acid bath a public execution? That would be too risky to the onlookers and executioners (Acid needs to be placed in glass, and tossing a thrashing convict in a glass tub may break it, sending acid everywhere in a nice little mini-wave), and the damage of the room would be intense.
Not if you use a 2 inch thick glass tube. I was thinking along the line of the convict being dropped into a huge tube filled with a corrosive liquid. Onlookers would watch the convict thrash around for a few seconds while the liquid would froth and turn muddy. Also, who says we have to use acid? Why not just use an extremely strong base/alkaline substance? Also, depending on the type of acid, glass isn't the only compound that can resist corrosion...
Lovely, Ivory soap on crack... Another cruel and inhumane execution method would be to fry the convict in a huge vat of oil... I had a dream like that once... I was dropped(or tripped I can't remember) into this huge vat of hot oil. The second I touched the liquid I screamed in agony. As I opened my mouth the hot oil found its way down my throat and into my lungs and stomach. Soon my eyes were burned out and my insides were being cooked. That's when I woke up of course...
Thermal shock should kill you before you suffer for too long. However, you can have some good old KFC afterwards - Kentucky Fried Convicts! In all honesty, when it comes to the death penalty, I don't think humanity should be a factor - you killed someone in cold blood (Since most of the death cases are murders) relinquishing your own humanity, why should we show you any scrap of what you've thrown away?
FINE THEN.
How about euthanasia? A nice pain
FREE lethal injection or a very painful acid bath?