Mystery is as much a characteristic of the art now as at any former period; but it is a mystery unallied to superstition,--a mystery whose interpreter is science,--a mystery which, instead of repelling the curious and frightening the ignorant, now invites the inquiring and delights the unlearned. By the following, we find that the romance of glass-making has not yet died out. We copy from the "Paris Annual of Scientific Discovery," for 1863, the following:-- "It would appear there is yet some secret in glass-making unknown to the world at large, as the manufactory of Mr. Daguet, of Soletere, France, is known to be in possession of an undivulged method, which enables them to make glass of a purity which all other manufacturers are not able to rival. A railway, recently constructed and running past Mr. Daguet's works, has so affected the glass-pots, by the tremor occasioned by the locomotives and trains, that work has had to be suspended. For this Mr. Daguet brought an action, during the past year, against the railway company for damages; but when the case came on for trial, the court held that it would be impossible to assess damages unless it were made cognizant of the secret, and its pecuniary advantage to Mr. Daguet. The latter declined imparting this, and the court refused to proceed further." We have shown that glass, while it has contributed so largely to the material well-being of man, has also administered profusely to the pleasure of woman. The belle enjoys the reflection of her beauty in its silvered face,--a pleasure peculiarly her own, as we all know,--and if we may believe poesy, the mermaid, her rival of the coral groves in the fathomless ocean, looks with equal satisfaction upon her dubious form, as seen in her hand-mirror. And what would Cinderella be to the nursery without her glass slipper! But leaving poetry to its own prolific devices, where would science find itself without the aid of glass? The astronomer's and chemist's vocation would be gone. Suns, planets, and stars would have no exact existence to us, and their laws be unknown. The seaman would blunder his way on the ocean, lucky if he guessed aright his course, and cursing his "stars," when he did not. In short, glass is the indispensable servant of science in almost all its forms, and where it does not discover it protects. Its loss would throw back the world into antediluvian ignorance, not to mention the countless eyes it would deprive of sight, of their intellectual food, and freedom of way. MANUFACTURE OF GLASS IN THE UNITED STATES, ETC.