RULE G—"The use of intoxicants or narcotics is prohibited"—one of twelve general rules in standard code adopted by Association of American Railroads, based upon previous regulations made by individual companies. Countless thousands of railroad men, especially boomers, have been discharged for violation of Rule G; not because of railroads' objection to liquor itself but because a man under the influence of liquor is not to be trusted in a job involving human lives and property