7. If you have ever, even once, observed a fly very closely, you must have noticed that it is provided with tiny hairs and bristle-like points all over its body. Yes, even the pair of wings on their outermost rim are provided with a large quantity of outward-running ray-like pointed little feathers.

8. What use is all this to the fly? Soon we will have the answer.

9. These little hairs and bristle-like points are all useful electricity vacuums, and the electricity sucked into the fly streams toward the negative pole, which is simultaneously serving as the attracting or drawing- together pole, which then flows into the already well-known little bells in the feet of the fly. Being negative, it becomes very hungry for the positive electricity.