Subsequently to the opening of the Penitentiary, some small defects in the structure and mode of discipline were revealed by experience, and promptly remedied as far as practicable. That some further improvements may yet be called for, not involving the fundamental principle of absolute separation, is not improbable, as we have never claimed that our work was perfect. The Annual Reports of the Inspectors placed in charge of the Institution, issued since its opening, afford most satisfactory evidence of the soundness of the principles recognized in its discipline, and our Prison Society, who have with deep interest watched its workings for more than thirty-two years, not only have never had misgivings in relation to it, but have constantly to the present time, been strengthened in the conviction of its being the true system. We are so well convinced of this, that it is deemed worth while, at this point, to introduce a short notice of the system itself; especially as we are aware that many persons both in this country and in Europe, are opposed to its introduction, mainly, as we believe, from a misapprehension of what the system and its results really are. We are the more prompted to this, from a belief that the cause of humanity and of Christian philanthropy, the good of the prisoner and of the community alike unite in calling for its general introduction. This notice, which from the character of the occasion, must necessarily be very brief, may partly assume the form of contrasting it with what is known as the “Auburn,” or “_Congregate, silent system_,” which is generally believed to approximate most nearly to it.