Mark Kemper, like the other captives, shuddered when he saw the acid vat.

It was all that saved him from a horrible bone-dissolving death in the acid vat.

But the man on the platform of the acid vat stood his ground.

Then he walked silently to the other end of the complex circuit running through the zinc and copper plates in the acid vats.

Vincent was carried inside and dumped on the floor near a big acid vat.

If the ore was poured too rapidly into the nitric acid vats a condition known as a "boilover" results.

Another hazard was the nitrogen dioxide fumes coming off the nitric acid vats.

It was like the acid vat in the movie 'Batman.'

We've got something here that's far more efficient than an acid vat for making spies talk.

Dorgan's men were now between The Shadow and the slippery edge of the acid vat.