It had three big cylinders to hold water as diving ballast and was designed for a crew of 12.

Each cylinder holds up to 12.7 tonnes (or 14 short tons) of UF.

If hollow, larger cylinders could have held smaller.

To keep down the weight, the cylinder holds only five cartridges.

And the cylinder held five rounds.

Those cylinders hold just so much air, remember?

The cylinders, Jahan explained, held written prayers which were believed to be wafted up to heaven by the spinning.

The bullets were so large that the Casull's bloated cylinder could hold only five of them at a time.

"Twenty millirads isn't dangerous to us standing here, but it's enough to confirm the cylinders recently held radioactive materials."

The barrel had a two inch bore, and the cylinder held five rounds.