Exhibits in the center of the car with a narrow aisle on each side. See page 86. The objects on the floor obstructing the aisle were probably placed in the aisle only for photographing. Jars of fruits and vegetables are attractively displayed at the right height, and with light shining through to bring out color and clearness. There is a welcome lack of crowding, and desirable simplicity in the car as a whole.] The third method, that of placing exhibits on one side only, seems to have been found the most satisfactory. In this way both wall and floor space on one side may be used to their full advantage, while the visitors looking in a single direction move fairly rapidly. A space may be left for the explainer between the wall and the counter, as shown in the picture opposite page 85. Also, she may move the length of the car and back without difficulty, having the counter between her and visitors. [Illustration: ARRANGEMENT OF RAILROAD CAR INTERIOR Simple and attractive arrangement of exhibits on the Wisconsin Pure Seed and Home Power Special. The exhibitors showed unusually good judgment in their use of wall space. The information given is brief, to the point, easily read, and well displayed. The disadvantages of displaying the exhibits on both sides of the narrow center aisle, discussed on page 84, are illustrated here.] PLACING EXHIBITS The first consideration in placing exhibits is that they shall be at the right height. The best space on walls is that on a level with the eye. The eye will travel up and down in following a display that has caught the visitor’s attention, but isolated placards, pictures, or objects placed too high or too low to be within easy range have small chance of being observed. The wall spaces of a car are considerably broken, as may be observed in the photographs. The curved space is excellent for decoration or for brief slogans, but should not be depended upon for anything requiring detailed examination. The upper part of the window space is usually most nearly at eye level, but windows are needed for light and it is wise not to cover with displays that shut out the light more than a half or a third of those on one side and none at all on the other. One needs to reckon with the possibility of trains often being placed close to the exhibit cars, or the cars being placed beside buildings that cut off the light entirely on one side. Probably the best use of windows is for cartoons or posters made on transparent paper or cloth, or on the familiar glass transparencies. The space below the windows is too low for wall displays. The illustration of the Pennsylvania Food Conservation Train opposite page 85 shows a good use of windows and wall space. Another photograph opposite page 87 also shows an interesting use of space.