That the art of glass manufacture is destined to greater progress and higher triumphs cannot for a moment be doubted; and the time will arrive when, from increased purity of materials and progressive chemical development, the present position of the art will fall comparatively into the shade. It is no undue stretch of the imagination to conceive that lenses shall be perfected whose purity will enable the astronomer to penetrate the remotest region of space; new worlds may perhaps be revealed, realizing all that the "moon hoax" promised-- "The spacious firmament on high, With all the blue ethereal sky And spangled heavens"---- be read as a book, and man perhaps recognize man in other worlds than his own. It may be that in its triumphs it is destined to concentrate the rays of the sunlight, and make the eye to pierce into the secrets and deep places of the sea, "Full many a fathom deep." Man may be enabled to read the wonders and the hidden works of the Almighty; it may be, that the power of the traditional lens of Archimedes upon the fleet of Marcellus shall be realized, in the absorbing and igniting, and perhaps useful power of some feature of its progress; and in its sphere, the art become fruitful in practical results, rivalling the highest attainments in the department of scientific progress. It is no visionary speculation to believe, that, by the aid of machinery, it may be readily rolled into sheets, as is iron or lead now in use. It will minister more and more to the necessities and comfort of mankind, and contribute largely to the many and various manufacturing purposes of the age. That its practical adaptations are not already known or exhausted, cannot be doubted; and its applicability, in some cheaper form, for vessels of large size and certain shape, and (strange as it may seem) for tessellated and ordinary flooring and pavements, are among the results which we think yet to be demonstrated in its progress. An elegant writer, in a late number of "Harper's Magazine," says:--