Figs. 1, 2, 3, and 4 represent a house at Buffalo belonging to the New York and Lackawanna Railroad Company, constructed of bricks and having a frontage of 90 feet. Between the openings in the latter there are pillars of dressed stone and cast iron columns. The building is four stories high, and the outer walls are 1 foot in thickness. During the month of June, 1882, this structure was raised all in one piece and moved back 35 feet, in order to give greater width to the railway. This work was performed in so regular a manner that no interruption occurred in the business of the Company's offices. The first operation consisted in running well squared spruce beams, 12 in. × 8 ft., through the walls and under the ground floor. These beams projected beyond the wall on each side and were spaced about 3¼ feet apart, and care was taken to have them in the same horizontal plane. After ramming down the earth upon which the timber work, f, was to rest, the first transverse beams forming the foundation platform were laid in place in such a way as to have between them the same spacing as between the cross-pieces, _a_, and so as to be exactly on the same level. These were afterward surmounted with longitudinal beams with alternate transverse ones until the desired height was reached. This framework having once been put in place, there were placed in the axis of each piece of timber work string-pieces, _b_, which ran without a break the entire length of the wall. Jack-screws, _v_, of the kind above described, were finally arranged in pairs under each of the cross-pieces, _a_. On the front side (Fig. 3) particular precautions were taken to support the stone pillars and iron columns. To this end, apertures were made in the foundation, starting from the axis of the pillars and terminating at the axis of the neighboring columns. Spruce sills were put into these openings and others between the columns, the last-named ones having been put in place after the masonry had been completely severed. The cross-pieces, _a_, were thus under the sills, _g_, before the putting in place of the screws, _v_, and these latter were maneuvered in such a way as to merely support the structure without lifting any of its parts. These preliminaries having been finished, all the pieces of the timber work were examined with the greatest care, while, at the same time, the joints were consolidated and the defects in leveling were rectified by means of spruce wedges. During the time of lifting, the workmen were arranged in pairs opposite each other, and on each side of the wall, where each one had 12 to 14 screws to maneuver. In order to render the motion very uniform, the superintendent of the work gave signals by means of a whistle. At this moment each man gave the screw a half revolution, passed to the following one, and continued thus until all the screws under his supervision had been revolved to the same degree. At a fresh signal this operation was begun again, and so on.