It would be out of reason to suppose that full consideration of the subject was omitted by a genius with such far reaching mental vision as Stradivari. That he gave all the necessary study and forethought to the effects of ordinary wear and such as was occasionally going on within his knowledge, there is evidence enough. He saw how the delicate work of his master, Nicolas Amati, was rapidly disappearing under sometimes rough and too often ruffianly usage. It was not in his power to prevent or interfere with this by any peculiarity of construction or quality of the varnish used by him. But this he doubtless knew--that the generally substantial work and total absence of any weak point of detail in design and execution was all that an artist could do. This strength shown over all of Stradivari's designs, even from the commencement, shows that in his grasp of the highest scale of requirement he was also anticipatory and in this wise, that he followed up the self evident principle in art, that the best combination of forms, proportions and masses will answer best for their permanence. The numismatist knows full well how, on the coins used in various countries, the masters of basso-relievo had concentrated their skill on the subject. The balance of projection and depression for good and proper effect under different situations of light and shade, or even independently of them on occasion--is of paramount importance in all branches of art in their widest range. The omission of proper thoughtful attention in this direction is one of the obstacles to success among copyists in any direction of art. In architecture the imitator or restorer of some early English mouldings has often made ignominious failures from the non-application of knowledge of this kind: just a trifling variation from the original while in progress being deemed of little consequence, but when finished and left for exhibition under the truth testing rays of the sun, the qualities that should have been there are, as the saying is, "conspicuous by their absence." In full view of the above and with an intelligence unsurpassable, Antonio Stradivari so arranged his forms and masses in construction that under fair usage and wearing down of the projecting parts, the original beauty of the whole should be retained as long as possible. A fine Stradivari much worn still retains its air of distinction, and very much of its material must have disappeared under bad treatment to make it beyond recognition almost at a glance.