For making the dynamos Edison secured, as noted in the preceding chapter, the Roach Iron Works on Goerck Street, New York, and this was also equipped. A building was rented on Washington Street, where machinery and tools were put in specially designed for making the underground tube conductors and their various paraphernalia; and the faithful John Kruesi was given charge of that branch of production. To Sigmund Bergmann, who had worked previously with Edison on telephone apparatus and phonographs, and was already making Edison specialties in a small way in a loft on Wooster Street, New York, was assigned the task of constructing sockets, fixtures, meters, safety fuses, and numerous other details. Thus, broadly, the manufacturing end of the problem of introduction was cared for. In the early part of 1881 the Edison Electric Light Company leased the old Bishop mansion at 65 Fifth Avenue, close to Fourteenth Street, for its headquarters and show-rooms. This was one of the finest homes in the city of that period, and its acquisition was a premonitory sign of the surrender of the famous residential avenue to commerce. The company needed not only offices, but, even more, such an interior as would display to advantage the new light in everyday use; and this house with its liberal lines, spacious halls, lofty ceilings, wide parlors, and graceful, winding stairway was ideal for the purpose. In fact, in undergoing this violent change, it did not cease to be a home in the real sense, for to this day many an Edison veteran's pulse is quickened by some chance reference to "65," where through many years the work of development by a loyal and devoted band of workers was centred. Here Edison and a few of his assistants from Menlo Park installed immediately in the basement a small generating plant, at first with a gas-engine which was not successful, and then with a Hampson high-speed engine and boiler, constituting a complete isolated plant. The building was wired from top to bottom, and equipped with all the appliances of the art. The experience with the little gas-engine was rather startling. "At an early period at '65' we decided," says Edison, "to light it up with the Edison system, and put a gas-engine in the cellar, using city gas. One day it was not going very well, and I went down to the man in charge and got exploring around. Finally I opened the pedestal--a storehouse for tools, etc. We had an open lamp, and when we opened the pedestal, it blew the doors off, and blew out the windows, and knocked me down, and the other man."