1. The leaves of the electroscope slowly diverge.

2. Her electroscope was a metal case with two holes in its side.

3. Figure 4 - 2 a present - day laboratory version of the electroscope.

4. Step 3 : If the aluminum foil ball is repelled away from the dish, the electroscope works.

5. Figure 4 - 2 shows a present - day laboratory version of the electroscope.