The fact has been already referred to that the principal monopolies which existed previous to the present century were those created by government. In the days when governments were less strong than now, and less able to raise money by such taxes as they chose to assess, it was a very convenient way to replenish the king's exchequer to sell the monopoly of a certain trade to some rich merchant. Nor was the establishment of these monopolies entirely without just reason. In those days of scarce and timid capital, inducements had to be held out to encourage the establishment of new enterprises. An instance of this, familiar to every one, was the grant to the owners of the first steamboat of the sole right to navigate the Hudson River by steam for a term of years. In the early history of the nation and in colonial days, government grants to establish local monopolies were very common. In this, however, we only followed the example of the mother country, which had long granted limited monopolies in trade and transportation as a means of encouraging new enterprises and the investment of capital. The monopolies of the present day which are properly considered as government monopolies are of two classes. The essential principle on which all are based is that their establishment is for the common benefit, real or supposed; but the first class--to which belong the patents and copyrights--are also justified on the ground that the brain worker should be protected in his right to reap the just profits from his labor. The effect of a copyright is simply to make it possible for an author to receive some recompense from his work. He can only do this by selling it in printed form to those who may wish to buy; but if there were no copyright, any printer might sell duplicates of the book as soon as it was issued, and could sell them at a much less price than the original edition, as the book would have cost him nothing to prepare. The practical result would thus be that few could afford to spend study and research in writing books, and the volumes which would be printed would be apt to be only those of so cheap and worthless a sort that no one would take the trouble to copy them. The monopoly produced by a copyright takes nothing from the public which it previously enjoyed. The writer of a book creates something which did not before exist; and if people do not wish to buy that which he has created, they are at perfect liberty not to do so. The monopoly relates only to the production and sale of that particular book. Others are at liberty to write similar books upon the same subject, which will compete with the first; and the same information may be given in different words without infringing the copyright.