The Edison laboratory deserves a chapter by itself. In 1886 Edison bought a fine villa in Llewellyn Park at a cost of $150,000. He took the house as it stood, with all its luxurious fittings, rather to please his wife than himself; a corner of the laboratory would suit him quite as well. Right outside the gates of the park and within view of the house, he bought ten acres of land and began his laboratory. Two handsome structures of brick, each 60 feet wide, 100 feet long, and four stories high, accommodate the machine-shop, library, lecture-room, experimental workshops, assistants' rooms and store-rooms. The boiler-house and dynamo-rooms are outside the main buildings. Also, in a separate room, the floor of which consists of immense blocks of stone, are the delicate instruments of precision used in testing electric currents. The instruments in this one room, twenty feet square, cost $18,000 to make and to import from Europe. Upon first entering the main building, the visitor finds what is apparently a busy factory of some sort, with long rows of machinery, from steam-hammers to diamond-lathes. Everywhere workmen are busy at their tasks, and Edison has good reason to be proud of his laboratory force, for it consists of the picked workmen of the country. Whenever he finds in one of the Edison factories in Newark, New York, Schenectady, or elsewhere a particularly expert and intelligent man, he has him transferred to the Orange laboratory, where, at increased pay for shorter hours, the man not only finds life pleasanter, but has a chance of learning and becoming somebody. The whole place hums with the rattle of machinery and glows with electric light. There are eighty assistants, who have charge of the various departments. The most expert iron-workers, glass-blowers, wood-turners, metal-spinners, screw-makers, chemists, and machinists in the country are to be found here. A rough drawing of the most complicated model is all they require to work from.