As we have already noted, the material objects distributed by the librarian are valued not for their physical characteristics but for a different reason altogether, the fact that they contain stored ideas. Ideas which, according to some, are merely the relative positions of material particles in the brain, and which are indisputably accompanied and conditioned by such positions, here subsist in the form of peculiar and visible arrangements of particles of printer's ink upon paper, which are capable under certain conditions of generating in the human brain ideas precisely similar to those that gave them birth. And although the book cannot think for itself, but must merely preserve the idea intrusted to it, without change, it is vastly superior in stability to the brain that gave it birth, so that thousands of years after that brain has mouldered into dust it is capable of reproducing the original ideas in a second brain where they may germinate and bear fruit. How familiar all this is, and yet how perennially wonderful! The miracle of it is sufficient excuse for this digression.
Now books, beside this modern form of distribution by loan, are widely distributed commercially both by loan and by sale, and especially in the latter form advertisement is now very extensively used in connection with the distribution. In fact we have all the different types specified above--economic, uneconomic and illegitimate, both through misrepresentation and the harmful character of the subject matter. The reason for all illegitimate forms of advertising is of course not a desire to misrepresent or to do harm per se, but to make money, the profit to the distributor being proportioned to the amount of distribution done and not at all dependent on its economic value. Distribution by public officers is of course not open to this objection, nor are the distributors subject to temptation, since their compensation does not depend on the amount of distribution. If they are capable and interested, furthermore, they are particularly desirous to increase the economic value of the work that they are doing. Since this is so and since the danger of uneconomic or harmful forms of advertising is thus reduced to a minimum, there would seem to be special reason why the economic forms should be employed very freely. But the fact is that they have been used sparingly, and by some librarians shunned altogether.