[2.8] What use is all this to the fly? Soon we will have the answer.

[2.9] 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.