sealed tubes (4)

These are four sealed glass tubes, all stored together in a shoebox. From top to bottom, these tubes are arranged in size from biggest to smallest:

1. The first tube is the largest in both length and diameter, with a round, darkish, stained ball at the base, a long, clear, glass shaft, and a bulbous tip with a small point at the end.

2. The second tube has a clear glass shaft that is approximately the same diameter as the first, but only half as long, with a narrower, thinner tip at the end, which also culminates in a point at the end.

3. The third tube has a narrow, cylindrical, clear glass shaft with a rounded closed end. The other end is broken.

4. The final tube is the smallest in length, although the diameter is slightly larger than the third tube. It seems to be slightly bent in the middle, with dark, smoky, pointy tips at each end (small electrodes?)