"the early history of the generation and use of steam" appeals mainly to:

ethos
logos
pathos
a combination of logos and ethos

logos

Explanation:

Logos means word, speech or reason. It is the use of reason and reasoning, whether inductive or deductive, to construct an argument. In persuasion, logos is the logical reasoning behind the speaker's statements. Logos refers to any attempt to appeal to the intellect, to logical arguments. In the case of the phrase "The Early History of the Generation and Use of Steam" the speaker the intellect to elaborate arguments that speak on the subject.

a foil character shows contrast with the qualities of another character. to emphasize the traits of the other character is the main objective. cassius is a foil to brutus, and brutus is a foil to antony. both cassius and antony conspire to kill caesar, but cassius is more prone to treachery than brutus is. thus, easily gives in to his evil ambition. brutus is a foil to antony because brutus’s honesty and simplicity are in clear contrast to antony’s qualities of deception and over-ambition.