Soda Can Leyden Jar

Step 4 Final assembly

Bore a hole in the center of the peroxide bottle cap. Insert the 8-32 bolt with one washer against the head. Put the other washer and nut on the outside and tighten almost completely. Attach a length of copper wire to the nut long enough to make good contact with the soda can. Tighten nut. Screw on the brass ball tip, if you have one.

Fit the cone top back onto the peroxide bottle. Keep it in place with a strip of electrical tape.

A rubber band around the outside foil makes it easier to connect wires to the jar.