【正文】
d mechanical etcetera that supplement and plement the force originating plant hidden below ground in the cellar. Finally, or at the beginning rather, there must be on the ground floor a main aperture or entrance mon to all the occupants or patrons of the building. This tabulation is, in the main, characteristic of every tall office building in the country. As to the necessary arrangements for light courts, these are not germane to the problem, and as will bee soon evident, I trust need not be considered here. These things, and such others as the arrangement of elevators, for example, have to do strictly with the economics of the building, and I assume them to have been fully considered and disposed of to the satisfaction of purely utilitarian and pecuniary demands. Only in rare instances does the plan or floor arrangement of the tall office building take on an aesthetic value, and thus usually when the lighting court is external or bees an internal feature of great importance. As I am here seeking not for an individual or special solution, but for a true normal type, the attention must be confined to those conditions that, in the main, are constant in all tall office buildings, and every mere incidental and accidental variation eliminated from the consideration, as harmful to the clearness of the main inquiry. The practical horizontal and vertical division or office unit is naturally based on a room of fortable area and height, and the size of this standard office room as naturally predetermines the standard structural unit, and, approximately, the size of window openings. In turn, these purely arbitrary units of structure form in an equally natural way the true basis 3 of the artistic development of the exterior. Of course the structural spacings and openings in the first or mercantile story are required to be the largest of all。 continued growth of population in the great cities, consequent congestion of centers and rise in value of ground, stimulate an increase in number of stories。 the invention and perfection of the high speed elevators make vertical travel, that was once tedious and painful, now easy and fortable。1 1 外文資料 The Tall Office Building Artistically Considered by Louis H. Sullivan, March, 1896 The architects of this land and generation are now brought face to face with something new under the sun namely, that evolution and integration of social conditions, that special grouping of them, that results in a demand for the erection of tall office buildings. It is not my purpose to discuss the social conditions。 I accept them as the fact, and say at once that the design of the tall office building must be recognized and confronted at the outset as a problem to be solved a vital problem, pressing for a true solution. Let us state the conditions in the plainest manner. Briefly, they are these: offices are necessary for the transaction of business。 development of steel manufacture has shown the way to safe, rigid, economical constructions rising to a great height。 these successfully piled one upon another, react on ground values and so on, by action and reaction, interaction an