The factors, which have influence upon the way of attaching the door, are numerous, but this paper reports how we have analyzed the result of the practical survey, which we have carried out, choosing chiefly the "turning angle" among three factors of the "turning angle" (the turning angle of the line connecting one shoulder with another), the distance of walking, and the time required, in view of the convenience and inconvenience based upon the motions of the human body at the time of the opening and shutting of the door, The present experiment has adopted the case where men enter, through a piece of the door with one leaf opening on hinges, into the sufficiently wide room from the long corridor. Moreover, the experiments were devided into the case where once the door was opened, men entered the room without shutting the door, and the case where men politely shut it behind them; and the results of photographing by the 8 millimeter-camera were analyzed.
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