The strength of the existing Patent-Laws lies in the vague belief of those who have not considered the subject that it would be unjust to deprive a man of the benefit of his discoveries. Those who are impressed with this elementary notion may be asked to reconcile it with the undeniable fact that the Patent-Laws do deprive, in the way we have shown, many men of the benefit of their discoveries; but a little reflection will convince them that their argument rests on a pure assumption. No man would be deprived of the benefit of his discovery because he did not receive a monopoly of its use. His own discovery would be his own discovery still. As long as he is allowed to employ his own inventions in any way he thinks proper he cannot be said to suffer any deprivation of a right. The truth is, that the Patent-Laws are a voluntary addition to our legislation based upon no such obligation as underlies the ordinary laws of property; and they must be justified, if they can be justified at all, as gratuitous creations of the Legislature, by proof that they produce some national benefit. It is from this point of view that we see the difference between the laws of Copyright and of Patents. They agree in being added on to what may be called the body of natural law, but the reasons in support of each are not the same, and the objections which apply to the law of Patents do not apply to the law of Copyright. The monopoly granted to an author does injustice to no one. The monopolies granted to patentees do injustice to many. Patents are creations of positive law, and must be judged accordingly. The Attorney-General approves them because they are designed to multiply inventions, although he admits that the multiplication of Patents is a serious evil. A sounder judgment will condemn them because of the evils necessarily attendant upon them; and we have no fear of what would happen to the course of invention or the progress of the country if they were abolished, and the inventor allowed to make such use of his invention as he may be advised. Inventions co-exist with Patents, but the experience of Switzerland is sufficient to show that they would abound if Patents did not exist, and the decline of commercial greatness with which Mr. Howard threatens us should Patents be abolished may be treated like so many other prophecies of evil which have been happily neglected and remain unfulfilled. _Leading Article from the “Economist,” June 5, 1869._