In some places the noon hour may be used for the attendance of factory workers and other employed people who are not far from the train. This is successful if advance preparations are made and if the subject matter is of interest to the workers. It is often possible to adapt the program and some part of the displays to their interests. Using the noon hour depends, of course, on having a large enough staff to allow each member an hour for lunch. The period from five to eight o’clock in the afternoon is probably of the least value. Usually the staff members themselves need relaxation during this time if there is to be an evening session.[9] If there is no session the train may pull out late in the afternoon. If, however, it is desirable to make use of this period, it may be possible to arrange for personal conferences or group conferences at the train or in town with persons especially interested in the subject who wish to have information that is not of interest to the general public or to talk over plans for the future. Reports as to the success of evening sessions vary greatly. Many have used the evening successfully for outdoor motion pictures or for meetings in town. The fact that many who could not leave their work during the day can come then seems to argue that it is possible to have a good attendance if the advance work has been thorough--provided also that the location of the car or train is satisfactory and that the time schedule will permit. EXPLAINING THE EXHIBITS While the exhibits should be so simple and well arranged as to be easily understood, any exhibit of objects, pictures, and printed words is more enjoyed and appreciated if it is brought to life by a personal interpretation given with enthusiasm. The explainer calls attention to what is displayed much as a chairman introduces a speaker. A good introduction makes the audience more friendly and responsive to either a speaker or an exhibit. The explainer who travels the length of the car with one group can take care of only a few people at a time, and if there is a continuous movement of people through the car only about one-third of them have the advantage of the explanation. If, on the outside or in another car, a lecture or demonstration precedes the reviewing of exhibits, the speaker may close the talk with an explanation of the purpose and character of the exhibits and some suggestions as to what to look for. With this preparation people may pass through the car unattended and perhaps meet an explainer at the far end who will answer questions and give out literature together with an invitation to take part in the follow-up program. Or the explainer may meet people as they enter the car and give a brief introduction to the exhibits.