Chapter V

      I

      Though bacteriology was all of Martin’s life now, it was the theory of the University that he was also studying pathology, hygiene, surgical anatomy, and enough other subjects to swamp a genius.

      Clif Clawson and he lived in a large room with flowered wallpaper, piles of filthy clothes, iron beds, and cuspidors. They made their own breakfasts; they dined on hash at the Pilgrim Lunch Wagon or the Dew Drop Inn. Clif was occasionally irritating; he hated open windows; he talked of dirty socks; he sang “Some die of Diabetes” when Martin was studying; and he was altogether unable to say anything directly. He had to be humorous. He remarked, “Is it your combobulatory concept that we might now feed the old faces?” or “How about ingurgitating a few calories?” But he had for Martin a charm that could not be accounted for by cheerfulness, his shrewdness, his vague courage. The whole of Clif was more than the sum of his various parts.

      In the joy of his laboratory work Martin thought rarely of his recent associates in Digamma Pi. He occasionally protested that the Reverend Ira Hinkley was a village policeman and Irving Watters a plumber, that Angus Duer would walk to success over his grandmother’s head, and that for an idiot like Fatty Pfaff to practice on helpless human beings was criminal, but mostly he ignored them and ceased to be a pest. And when he had passed his first triumphs in bacteriology and discovered how remarkably much he did not know, he was curiously humble.

      If he was less annoying in regard to his classmates, he was more so in his classrooms. He had learned from Gottlieb the trick of using the word “control” in reference to the person or animal or chemical left untreated during an experiment, as a standard for comparison; and there is no trick more infuriating. When a physician boasted of his success with this drug or that electric cabinet, Gottlieb always snorted, “Where was your control? How many cases did you have under identical conditions, and how many of them did not get the treatment?” Now Martin began to mouth it—control, control, control, where’s your control? where’s your control?—till most of his fellows and a few of his instructors desired to lynch him.

      He was particularly tedious in materia medica.

      The professor of materia medica, Dr. Lloyd Davidson, would have been an illustrious shopkeeper. He was very popular. From him a future physician could learn that most important of all things: the proper drugs to give a patient, particularly when you cannot discover what is the matter with him. His classes listened with zeal, and memorized the sacred hundred and fifty favorite prescriptions. (He was proud that this was fifty more than his predecessor had required.)

      But Martin was rebellious. He inquired, and publicly, “Dr. Davidson, how do they know ichthyol is good for erysipelas? Isn’t it just rotten fossil fish—isn’t it like the mummy-dust and puppy-ear stuff they used to give in the olden days?”

      “How do they know? Why, my critical young friend, because thousands of physicians have used it for years and found their patients getting better, and that’s how they know!”

      “But honest, Doctor, wouldn’t the patients maybe have gotten better anyway? Wasn’t it maybe a post hoc, propter hoc? Have they ever experimented on a whole slew of patients together, with controls?”

      “Probably not—and until some genius like yourself, Arrowsmith, can herd together a few hundred people with exactly identical cases of erysipelas, it probably never will be tried! Meanwhile I trust that you other gentlemen, who perhaps lack Mr. Arrowsmith’s profound scientific attainments and the power to use such handy technical terms as ‘control,’ will, merely on my feeble advice, continue to use ichthyol!”

      But Martin insisted, “Please, Dr. Davidson, what’s the use of getting all these prescriptions by heart, anyway? We’ll forget most of ’em, and besides, we can always look ’em up in the book.”

      Davidson pressed his lips together, then:

      “Arrowsmith, with a man of your age I hate to answer you as I would a three-year-old boy, but apparently I must. Therefore, you will learn the properties of drugs and the contents of prescriptions because I tell you to! If I did not hesitate to waste the time of the other members of this class, I would try to convince you that my statements may be accepted, not on my humble authority, but because they are the conclusions of wise men—men wiser or certainly a little older than you, my friend—through many ages. But as I have no desire to indulge in fancy flights of rhetoric and eloquence, I shall merely say that you will accept, and you will study, and you will memorize, because I tell you to!”

      Martin considered dropping his medical course and specializing in bacteriology. He tried to confide in Clif, but Clif had become impatient of his fretting, and he turned again to the energetic and willowy Madeline Fox.

      II

      Madeline was at once sympathetic and sensible. Why not complete his medical course, then see what he wanted to do?

      They tramped, they skated, they skied, they went to the University Dramatic Society play. Madeline’s widowed mother had come to live with her, and they had taken a top-floor flat in one of the tiny apartment-houses which were beginning to replace the expansive old wooden houses of Mohalis. The flat was full of literature and decoration: a bronze Buddha from Chicago, a rubbing of Shakespeare’s epitaph, a set of Anatole France in translation, a photograph of Cologne cathedral, a wicker tea-table with a samovar whose operation no one in the University understood, and a souvenir post-card album. Madeline’s mother was a Main Street dowager duchess. She was stately and white-haired but she attended the Methodist Church. In Mohalis she was flustered by the chatter of the students; she longed for her home-town, for the church sociables and the meetings of the women’s club—they were studying Education this year and she hated to lose all the information about university ways.

      With a home and a chaperone, Madeline began to “entertain”: eight-o’clock parties with coffee, chocolate cake, chicken salad, and word-games. She invited Martin, but he was jealous of his evenings, beautiful evenings of