After a felicitous exordium, descriptive of the scene which the Fair presented to the eye of the spectator, the writer proceeds to consider the connection between the arts of industry, and especially the mechanic arts, and the intellectual and moral improvement of society. He shows that the mechanic, laboring at his work-bench, is toiling for the general improvement; that the man who designs and erects a noble structure, speaks to passing multitudes, who may never read a book, and helps to refine and humanize the ages that come after him; that 'even he who makes a musical instrument, is laying up, in those hidden chambers of melody, the sweet influences that shall amuse, and soften, and refine many a domestic circle through life; and he, yet more, who can place upon our walls the canvass glowing with life, becomes the household teacher of successive generations.' The orator next repudiates the idea, that labor-saving machinery has ever been the cause of permanently injuring the working-classes; and this position he clearly establishes, by a variety of well-chosen illustrations. A few remarks succeed, in relation to improvements in matters of comfort and economy, of which advantage might be taken by American house-keepers. The French bed, consisting of two thin matresses of wool, upon a foot deep of hay or straw, is pronounced to be four times as cheap as ours, and twice as comfortable. One half of the fuel, too, which is burnt in this country, the writer avers, is literally thrown away, the heat passing into the dead wall of the chimney. This is doubtless true. The excellent stoves of Dr. NOTT, however, now so generally demanded in all parts of the country, from his capable successors, Messrs. STRATTON AND SEYMOUR, of this city, have done much toward awakening attention to the great economy of heat and fuel, which they exemplify and inculcate. Labor, the writer justly contends, exercises and tasks the intellect; and he repels, with proper earnestness and force, the too common error, that the mind never labors, save over the written page or the abstract proposition. 'The merchant, the manufacturer, the mechanic, is often a harder thinker than the student. The machinist and the engineer are employed in some of the finest schools of intellect.' The tasks for which no such consideration can be pleaded, such as the dull, heavy labors of the hod, the writer humanely hopes some method may yet be found to relieve. Could any thing be more admirably reasoned, or more beautifully set forth, than the arguments in favor of the true nobility of labor, contained in the annexed paragraphs: