A new article has been introduced into the commerce of art. The Stereoscope, although an invention no longer new, is yet now for the first time brought to New-York in manufacture, and the exquisite representations of nature and art which have been made by it for a few years past in Paris, London and Philadelphia, are just beginning to find among us appreciation and customers. Those who have seen the marvelous fidelity with which it repeats to us the triumphs of man and the wonderworks of God, the weird trick by which Niagara and the Pyramids are brought before us in all the sublimity of reality, will hardly be able to understand why an art so generally diffused in London that already there are there circulating libraries of Stereoscopes, has hitherto found so little encouragement in this country. Yet we are informed by Mr. Beckel, one of the largest importers, that he kept his first invoices for along time, and was obliged to sell them then far below cost, and in fact that the whole amount sold in this country so far, does not amount to much more than $50,000 at retail, or about half the sum at wholesale.

  ...A Stereoscopic Company has just gone into operation in this city. It has complete sets of scenery for groups, and hopes to find a considerable demand for family groups, which are taken finely. A group of 50 persons can be taken, but 10 or 12 are more convenient. A family of negroes are now sitting for groups to illustrate Uncle Tom's Cabin. At the salesrooms are a good assortment of views where many pleasant hours can be spent in looking over them. Here one may see Sunnyside, with Washington Irving sitting in his porch; Longfellow's residence with the poet standing in the doorway; Agassiz' house, with the unbought naturalist sitting on his steps; most of the views enumerated above; all sorts of domestic scenes, such as a series representing a courtship and marriage, and married life, from girlhood round to blooming girlhood again; sports and plays; everything. One cares no longer to go to Moscow, for here is the Kremlin and the great bell with the crack in it, and we can see it just as well on Broadway or at home.