The Power House, in the former method of transmitting power by shafting and belting, was located as nearly as possible in the center of the space over which power was to be distributed. Since the advent of electricity and its common use for transmitting power, the question of the location of the power house is relieved from this condition; it may be located at the point most convenient to railroad facilities for receiving fuel, or for obtaining the necessary water for boilers, for fire purposes, etc. In a plant manufacturing small machines or a kind of product which is shipped in small quantities, it is obvious that the Shipping Room must be convenient to the point from which these goods are to be taken by railroad cars, by boat, or by teams. If most of the shipping is of large machines or articles which must be handled by cranes, the railroad tracks will be run into the erecting building, and the machines loaded there, in order to avoid the expense of extra handling and moving them. This is the arrangement shown in Fig. 1. In this case the shipping room may be in the Administration Building, so as to be convenient to the other office departments. In some kinds of business it is convenient to have the shipping room and general storeroom near each other, as there is considerable business done in each that is quite closely related to the other. The Iron and Brass Foundry is usually located at some distance from the manufacturing buildings, in order that the latter may be as free as possible from the annoyance of smoke and dust. It is connected with the other departments by the system of shop and yard tracks, and the railroad siding track passes through one end of the building as a matter of convenience in shipping castings. There is also a branch track running along the side of the foundry building for the purpose of delivering coke, coal, moulding sand, pig iron, scrap iron, and other foundry materials. It should be noted that the buildings shown in the plan are located in a compact mass, with considerably less than the usual yard room. In this instance, however, the plan was so drafted to economize space on the drawing. It is the law in some European countries that not over 50 per cent of the area of a manufacturing site shall be covered by roofs. Such a law would be of much value in this country, to prevent the crowding of buildings to such an extent as to be unhealthful to employees.