It is to the increase of demand, growing out of the increase and cheapness of production, that he must look for employment and profit, not to the catching at the empty bubble of ownership, or to the ambition of governing, with none to serve under him. “LABOR AND MACHINERY. A thoughtful laborer—for wages—sends us an account he finds current in the journals of the rapid progress of Printing by Machinery, as illustrated by a single cheap daily newspaper. That paper now prints 48,475 sheets—or 101 reams—per day, which it is enabled by rapid machinery to do from one set of types, whereas, if obliged to use the Hand-Press of former days, it would be obliged to set up its type _twenty-nine times_ over for each daily edition, employing 812 compositors instead of barely 28, and 116 pressmen instead of some ten or twelve only. Hereupon our correspondent comments as follows:— Mr. Greely:—It will be seen by the above, which I quote merely as a convenient text to illustrate the matter in hand, that in _one_ establishment a _difference_ is made of nearly or quite _nine hundred_ men, in consequence of the invention or improvement of machinery, which has taken place within a less time than the last 25 years, from the number it would have been necessary to have employed to prosecute the same amount of business had no such progress been made. The same is true, I suppose, to an equal extent, of _The Tribune_ and other journals of large circulation. The same—i. e., _the alarming encroachment which machinery is every day making on what has heretofore been performed by human muscles alone_—is not peculiar to any one branch of employment. The restless inquiry and invention of the present is rapidly and surely intruding _iron_ muscles, which do not become hungry, or experience the depression of low wages and consequent low fare, into every department of human industry, crowding out and setting adrift thousands of the industrious, to seek new and untried means of subsistence, from which soon again to be driven, by—what many of them have come to look upon as their greatest, most persevering and relentless enemy—machinery.