How did Granville Woods improve the telegraph?

Based on "telegraphony," Woods invented the induction telegraph in 1887. Prior to its creation, moving trains were unable to communicate with each other or with rail stations, resulting in dangerous situations. He also improved the automatic air brake used by railroad cars.

Explanation:

answer; slavery should be outlawed in the new country, was part of the initial draft of the declaration of independence, but not part of the final