In the short story 'Paul's Case: A Study in Temperament' by Willa
Carthur, the reason Paul goes to work is that he has finally found a job
and a life that he enjoys, and is keen to ensure he does not lose it.
However, as we learn later in the story, he is not as happy as he seems
at first.
The outcome of a poorly written subject line is that it won't be able to convey the message of what the writer would like to say to the reader or to the one that he or she had sent it to, It is because a subject line is the idea or tries to pertain and point out what is the message about. If it is written poorly, then it would only confuse the reader and in the same time there is no understanding and connection of the subject line to the message.
first authors first and last name, then the title of the book followed by any chapters/sections used. then the volume (in applicable) them publishers and the year it was published. any editors are out at the end
Tom feels like he is of the "superior" race. He explains a book that he read that says that if they don't watch out, the white race will be "submerged" in just a matter of years. Clearly he believes that as a white man he is of the dominant race, and the fact that there is a book published about it and he can freely say these things shows that many people in society are of the same mind.
Some people today still think this way, although it is socially not acceptable to say it or act like it. Fitzgerald probably included this information to show how opinionated Tom is and set the tone of society at the time.