pound on the cotton cleaned with his machines in one year. Estimating the value of the labor of one man at twenty cents per day, the whole amount which had been received by him for his invention was not equal to the value of the labor saved in _one hour_ by his machines then in use in the United States. "This invention," he proceeds, "now gives to the southern section of the Union, over and above the profits which would be derived from the cultivation of any other crop, an annual emolument of at least _three millions_ of dollars."[22] The foregoing statement does not rest on conjecture, it is no visionary speculation,--all these advantages have been realized; the planters of the Southern States have counted the cash, felt the weight of it in their pockets, and heard the exhilarating sound of its collision. Nor do the advantages stop here. This immense source of wealth is but just beginning to be opened. Cotton is a more cleanly and healthful article of cultivation than tobacco and indigo, which it has superseded, and does not so much impoverish the soil. This invention has already trebled the value of the land through a large extent of territory; and the degree to which the cultivation of cotton may be still augmented, is altogether incalculable. This species of cotton has been known in all countries where cotton has been raised, from time immemorial, but was never known as an article of commerce until since this method of cleaning it was discovered. In short (to quote the language of Judge Johnson), "if we should assert that the benefits of this invention exceed _one hundred millions of dollars_, we could prove the assertion by correct calculation." It is objected that if the patentee succeeds in procuring the renewal of his patent, he will be too rich. There is no probability that the patentee, if the term of his patent were extended for twenty years, would ever obtain for his invention one half as much as many an individual will gain by use of it. Up to the present time, the whole amount of what he has acquired from this source (after deducting his expenses) does not exceed one half the sum which a single individual has gained by the use of the machine in one year. It is true that considerable sums have been obtained from some of the States where the machine is used; but no small portion of these sums has been expended in prosecuting his claim in a State where nothing has been obtained, and where his machine has been used to the greatest advantage. There was much more which was curious, laid out in different books; but the call came for supper, and the young people obeyed. XII. JAMES NASMYTH. THE STEAM-HAMMER. "My dear Uncle Fritz, I have found something very precious." "I hope it is a pearl necklace, my dear," was his reply, "though I see no one who needs such ornaments less."