Then it dawned upon the lad that the libraries of scientific records of which Survey workers are the authors must needs require time and labor, and the compilation of statistics needed in other parts of the government service also takes up time. So that Roger began to see that the proofreading of all geologic and topographic maps, all illustrations and all text of Survey papers have to be done and revised by competent men, in order that the scientific accuracy of these can never be impeached. He saw the scope of the annual reports, the monographs, the professional papers and the bulletins, and was not surprised to learn that these were in great demand, not only in the United States, but by foreign governments as well.

"But all this," said Roger to his friend the secretary, as they were talking together one day, "must cost the country a heap of money."

The other smiled.

"It has saved the country a great deal of money," he said. "In the first place the Survey is very economically run, and then besides, millions of dollars have been put into the hands of manufacturing interests by pointing out to them the value of by-products which formerly were wasted."

"For example, Mr. Mitchon?"

"Well, for example, the waste of the by-products of coke-ovens, such as coal-tar, ammonia, etc.," replied the secretary. "Here, come with me to the laboratories, and I'll show you."

In the large chemical and physical laboratories at Washington the boy found samples of metals and minerals of all sorts being tested and analyzed. He found that all the great works of the government are undertaken only with the advice of the Geological Survey, and he learned, moreover, that in certain branches the Chemical Laboratories stand higher than those of any government in the world.

As each day passed the lad heard of some new activity of the Survey. He learned that every ton of coal consumed and every ounce of gold mined, was duly recorded by the Survey, and to his amazement discovered that the due safeguarding of life in mines and quarries was not outside its province. The refining of oil was regarded as appertaining to minerals, and many difficulties of fuel in steam engineering the boy found to have been minimized by the Survey in the power and lighting plants of the government. And, if this were not enough, it was borne in upon him that even such structural materials as brick, terra cotta and the concrete bodies, had in some cases found their beginnings and in others their best development under a further division of the Survey.

Then, to cap all, it was shown to Roger, that this multifarious work required careful and prudent administration, supervising all the details of personnel, expense, purchase, and distribution of supplies and so forth, to say nothing of adjunct matters, like library and fossil work. Thus it was, that when the boy left Washington a month later, he had decided that an entire lifetime on the Survey would be all too little to grasp the vast and dominating usefulness that it bore to the country at large.

Thus the fated day arrived for Roger's start. He had made himself well-liked all through the building, and there were many to wish him luck on the expedition. A most hearty and cordial good-fellowship Roger found to run through all departments, and the good wishes of his superiors and companions were happy auguries for the start. The Director, too, called him into his office and gave him a most encouraging send-off, sounding no note of doubtfulness or regret, and Roger felt, as he left Washington, that no boy could ask pleasanter friends or more helpful comrades than those he had met on the Survey.