Shortly after the death of Mr. Hoe, sen., his sons and successors, finding the then premises insufficient, moved to the ground now occupied by their great manufactories, occupying a hollow block four stories in height, of two hundred feet front on Broome street, by one hundred in depth on Sheriff and Columbia streets, as also a second lot on the other side of Broome street, containing their saw works, hardening furnaces, stables, and other necessary buildings. In these works, a bird’s eye view of which is pre-fixed to this paper, and the ground plan of which we here present, the Messrs. Hoe continually employ three hundred men, some of them persons of great ability as draughtsmen, pattern-makers, mechanicians, and the like—men literally of every nation, as nearly as may be, under the sun; among whom are comprised several Armenians, said to be persons of great intelligence and excellent deportment. Besides this, their principal factory, they have another large and well built establishment, containing ware-rooms, counting-house, blacksmith’s shop, machine shop, and steam-engine room, in Gold street, nearly adjoining Fulton. This, though in fact headquarters, we shall pass over for the time being, premising only—in order to show the perfect method and system of time and labor-saving with which every thing belonging to this firm is conducted—that they have at their own expense, and for their own private use, erected an electric telegraph, carried by the permission of the proprietors over the roofs of houses, from the counting-room to the up-town factories, by which the smallest message or order is conveyed, and answered almost instantaneously. Nor are the proprietors dissatisfied with the result, having found by experience that the great original expense was very speedily compensated by the gain of time, and yet more of precision which it introduced. Returning up-town, therefore, we will descend into the vault under the first yard, in which we shall find the moving puissance of all the vast machinery of hammers, planes, lathes, drills, grindstones, tools and devices, almost without name or number, which are constantly laboring with their iron nerves, noiseless, tireless, indefatigable, through every story of the great building—in the shape of the boilers and steam-engine, which, beside furnishing all the motive power, supply every part of the building, by a very ingenious application, with a constant stream of evenly tempered, pure, heated air, at the same time maintaining a thorough ventilation, and all without the slightest danger of fire. The spent steam is brought into a series of coiled pipes within a trunk, through which a continual stream of pure external air flows without intermission, and is carried by wooden tubes through every story and room of the building; as is likewise an ample provision of Croton water, as well a provision against fire, as for the cleanliness and comfort of the men.