A photograph, brush drawing, or any copy that is not made up of line or stipple, can be produced without the necessity of a line drawing by the aid of the half-tone process. There are several of these processes in operation in this country; and, although originally introduced in Germany by Miesenbach, it has been so improved by American inventors that the European work is far below the standard of the United States. The principal methods of _half-tone_ in this country are worked secretly by the inventors, each having modifications and improvements of his own. It is impossible to give a thorough description here, as none of the inventors are willing to risk patenting their processes, and a complete publication is not desirable. The copy is first photographed, giving a negative with all the details of the original. This negative is then exposed to the camera, and the result is a _positive_, or, as commonly called, a transparency. This positive is then placed in contact with a glass plate covered with ruled lines. This plate is termed a _grating_. Being placed in contact, they are then photographed together, giving a negative of the object made up of lines and dots, representing the lights and shades of the picture. Here the half-tone process ends, the resulting plate being produced by any of the photo-engraving methods; but the most satisfactory results are obtained by photo-etching. The main objection to the half-tone plates is their lack of relief. No great depth can be obtained without sacrificing the effect. In printing these plates the greatest care in _making ready_ must be exercised, and a smooth surface paper must be used. It is also necessary that a fine grade of ink be used in small quantity, and that it should be properly distributed. [Illustration: METAL HOUSE.] A WALK OVER OUR FOUNDRY. Mr. Typograph, how are you, sir? Glad to see you. How is business with you? Plenty to do, and customers paying up? You are so prompt in paying us, that we have no doubt you have a noble set of customers. You wish to add to your stock our new things? All right, sir. You have a fine office already, but you want to keep up with the times, and give your patrons the best the type-founder can invent? That’s the way, sir. The man on the lookout sees the sun the earliest. Mr. Faithful, show our new things to Mr. Typograph, and take his order.