As to copper-printing: in the future, as lithography extends, there probably will remain an advantage with the copper in the case of only two styles, the engraving done with the engraving needle, and the etching, the latter being worked up with the graver and the cold needle. In this respect, however, the skill of the artist must be taken into account, for a good man can produce better work on stone, even in those two styles, than a less skillful man can produce on copper. We can declare the same of the stipple style in copper, when done in the style of Herr Bartolozzi, or even like the very foremost of the copper engravers in this style, Herr John of Vienna. All other methods (and even these three if done with less care or skill on copper) must yield place to a good design on stone; especially if one takes into account the ease of execution, the lesser need for skill, the greater speed of printing, and the almost countless impressions that are possible. For instance, printing music from the stone has a decided advantage over zinc plates, both because of smaller cost and greater beauty. It is easier to produce all kinds of script on stone, both with fatty inks and with the engraving needle. Therefore lithography serves excellently for charts and similar work, which can be done at least three times faster on stone than on copper. If copper-printing is to reach a high degree of perfection, the printing itself must be done by very excellent workmen. Indeed, some persons allege that the very best German copper-plate printers do not yet equal the Parisians. Printing from stone is not so difficult, and only a few particular methods demand especial care or unusual knowledge. Because of the greater ease of inking, the speed of stone-printing may be assumed to be at least five times as great, often ten times, and especially so when large plates are to be printed. Besides, it is much easier to make corrections on stone than on copper and zinc. From all this it appears that lithography makes it much easier to write and design and then to print swiftly and produce any desired number of impressions, of all those works that heretofore could be produced only on copper or zinc, providing they do not demand the very greatest degree of delicacy, strength, and sharpness obtainable with copper; in a word, so long as it is not vital to attain the utmost possible artistic beauty. Further, most of these works done on stone, by only average artists and printers, usually are more beautiful than if they had been done by the same men in copper or zinc. This property alone gives lithography a preëminent value, the more so as no great expense is incurred in establishing a plant. But in addition to this, there are several art methods peculiar to it, which cannot be imitated by book-printing or copper-print, and which make it possible for almost every writer or artist to manifold his works without any especial skill.