Characterization is when the author reveals the personality of the characters; Direct characterization is when the author flat out TELLS the audience what the personality of the characters are.
Many scientific theories that are mentioned in the novel have been applied in real life. For example, Galvani proved that stimulation of a frog's nerve causes contraction of the muscle to which it is attached. This was proven in 1791. Because of this discovery, there was extensive research and excitement throughout the European nation on the application of electricity to sustain human life.
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