produced by the great tension of the strings of the piano in "tuning up to pitch," amounting to several tons.

But we must pass on to the next room. We step on a raised platform about four feet by eight, and, touching a short lever, find ourselves going up to the next floor. Perhaps a lot of lumber is on the platform with us, on its way to the drying-rooms. On getting on a level with the floor, we again touch the magic lever, and our steam elevator (or dumb waiter) stops, and, stepping off, find ourselves surrounded with workmen; and this is the "case-making" department. And here we find piano-forte cases in all stages of progress; the materials for some just gathered together, and others finished or finishing; some of the plainest styles, and others of the most elaborate carved work and ornamental designs. Nothing doing but making cases; two rooms adjoining, 115 feet long, with workmen all around as close together as they can work with convenience. Each room is furnished with its steam ovens, glue heaters, &c. The case-maker makes the rims of the case, and veneers them. He fits and secures these to the bottom. He also makes and veneers the tops. This completes his work, and then we have the skeleton of a piano, the mere shell or box. The rim is securely and firmly fastened to the strong bottoms, bracing and blocking being put in in the strongest and most permanent manner, the joints all fitting as close as if they grew together; and then the case is ready to receive the sounding-board and iron frame. The bottoms are made mostly of pine; the rims of the case are of ash or cherry, or of some hard wood that will hold the rosewood veneers with which they are covered. The tops are made of ash or cherry, sometimes of mahogany, and veneered with rosewood. We will now follow the case to the room where the workmen are employed in putting in the sounding-board and iron frames.

SPINNING-MACHINE.

SOUNDING-BOARD AND IRON-FRAME ROOM.

The sounding-board is what, in a great measure, gives tone, and the different qualities of tone, to the piano. Messrs. Boardman & Gray use the beautiful white, clear spruce lumber found in the interior counties of New York, which they consider in every way as good as the celebrated "Swiss Fir." It is sawed out in a peculiar manner, expressly for them, for this use, selected with the greatest possible care, and so thoroughly seasoned that there is no possibility of its warping or cracking after being placed in one of their finished instruments. The making of the sounding-board the requisite thinness (some parts require to be much thinner than others), its peculiar bracing, &c., are all matters that require great practical experience, together with numberless experiments, by which alone the perfection found in the piano-fortes of Messrs. Boardman & Gray, their full, rich tone giving the most positive evidence of superiority, can be attained.

We will watch the processes of the workmen in this department. One is at work putting in the "long-block" of hard maple, seasoned and prepared until it seems almost as hard as iron, which is requisite, as the "tuning-pins" pass through the plate into it, and are thus firmly held. Another workman is making a sounding-board, another fitting one in its place, &c. &c. All the blocking being in the case, the sounding-board is fitted and fastened in its place, so as to have the greatest possible vibrating power, &c.; and then the iron frame must be fitted over all and cemented and fastened down. The frame is finished, with its hundreds of holes and pins, in the drillers'-room, and the workman here has only to fit it to its place and secure it there; and then the skeleton case is ready to receive its strings and begins to look like what may make a piano-forte.

Spinning the bass strings, and stringing the case, come next in order. In the foreground of the last plate, we have a curious-looking machine, and a workman busy with it winding the bass strings, a curiosity to all who witness his operations. To get the requisite flexibility and vibration to strings of the size and weight wanted in the bass notes, tempered steel wire is used for the strings, and on this is wound soft annealed iron wire, plated with silver; each string being of a different size, of course various sizes of body and covering wire are used in their manufacture. The string to be covered is placed in the machine, which turns it very rapidly, while the workman holds the covering wire firmly and truly, and it is wound round and covers the centre wire. This work requires peculiar care and attention, and, like all the other different branches in Messrs. Boardman & Gray's factory, the workmen here attend to but one thing; they do nothing else but spin these bass strings, and string pianos year in and year out.

The case, while in this department, receives all its strings, which are of the finest tempered steel wire, finished and polished in the most beautiful manner. But a few years since, the making of steel music wire was a thing unknown in the United States; in fact, there were but two factories of note in the world which produced it; but now, as with other things, the Americans are ahead, and the "steel music wire" made by Messrs. Washburn & Co., of Worcester, Mass. is far superior in quality and finish to the foreign wire. The peculiar temper of the wire has a great influence on the piano's keeping in tune, strings breaking, &c., and, as the quality cannot always be ascertained but by actual experiment, much is condemned after trial, and the perfect only used.