The model railroad service, therefore, is now to be considered. Of what would it consist? At present, there is practically no difference between individuals in the employ of a great railroad corporation. All the wage-earners in its pay stand in like position toward it. There should be a difference among them; and a marked difference, due to circumstances which should receive recognition. Take again the case of the Union Pacific. The Union Pacific, it has already been mentioned, numbers 14,000 employees in its operating department as a maximum, and 12,000 as a minimum. They vary with the season of the year, increasing in summer and diminishing in winter. Consequently there is a large body of men who are permanently in its employ; and there is a smaller body, although a very considerable portion of the whole, who are in its employ only temporarily. Here is a fact, and facts should be recognized. If this particular fact is recognized, the service of the company should be organized accordingly, and each of the several divisions of the operating department would have on its rolls two classes of men: First, those who have been admitted into the permanent service of the company; and, second, those who for any cause are only temporarily in that service. And no man should be admitted into the permanent service until after he has served an apprenticeship in the temporary service. In other words, admission into the permanent service would be in the nature of a promotion from an apprenticeship in the temporary service. Those in the temporary service need not, therefore, be at present considered. They hold to the companies only the ordinary relation of employee to employer. They may be looked upon as candidates for admission into the permanent service--they are on probation. So long as they are on probation they may be engaged and discharged at pleasure. The permanent service alone is now referred to.