It gave me some trouble, because I had to cut out the bottom first and solder it on again afterwards.

When prepared for use, the can enclosed a wide-mouthed, well-corked jar of thick glass packed around with some wet clay and containing sixteen ounces of X2 green powder.

The detonator was connected with the screw top of the can.

It was ingenious--a combination of time and shock.

I explained the system to him.