A car interior on the Pennsylvania Food Conservation Train designed to overcome as many as possible of the difficulties in train exhibiting. The curved space, too high to attract attention easily, is used for a symbolic frieze in colors, the design, in three parts, being repeated five times and running the length of the car. The same space was used less successfully, as shown in the cut opposite page 70, for reading matter which was read only when the explainer called attention to it. The framed captions and the pictures below them are approximately at eye-level. Variety combined with a symmetrical arrangement is obtained by placing a large poster over every fourth window, while the transparencies on the remaining windows allow plenty of light to enter. Exhibits are displayed on one side of the car only. An economical use of the 9-foot width of the car is obtained as follows: Raised platform for the explainer, 20 inches wide. Counter, 28 inches wide. Aisle for visitors, 4.5 feet wide. The use of vertical space is also carefully planned and is roughly: Counter height, 40 inches. Upright board at back of counter, 11 inches high. Combined height of pictures and captions, 36 inches, with lower edge about 48 inches from the floor.] The first method, that of displaying exhibits on two sides of the center aisle, makes the progress of the visitor very slow and awkward, for he must continually turn from one side to the other as he goes unless, of course, he violates the rule of moving in one direction only and in so doing comes back along the same aisle. Not only is it awkward to turn continually from side to side in viewing exhibits but it is difficult to arrange material so that the visitor can in this way follow an idea logically. His attention is alternately given to the topics on one side and the other, unless by some elaborate system of arrangement the story moves from one side to the other. Another difficulty is that the explainer has no place to stand except in the aisle, holding back the visitors. The very narrow middle aisle left by counters or tables on two sides is still another disadvantage. Moreover, favored with space at the expense of visitors, the exhibits are less likely to be seen and their value is thus lowered. Displays along the center of the car with an aisle on each side might be satisfactory in some cases, especially if all the material is in the form of models or objects and there is no need to use the walls. This method allows for the movement of visitors in single file down one aisle and back the other, or for two parallel lines to move in a single direction on both sides of the display. Some who have tried this method found that visitors did not look at the walls but gave their whole attention to the center of the car. [Illustration: FOOD CONSERVATION TRAIN OF NEW YORK STATE COLLEGE OF AGRICULTURE