METHOD OF ILLUSTRATING LECTURES TO SMALL GROUPS GEORGE W. ECKERT University of Missouri School of Mines and Metallurgy, Rolla, Missouri
WHERE projection machines or sufficient board space are not available for a large number of illustrations, the apparatus shown in the photograph affords an inexpensive method of presenting drawings and tables to a small audience. This method has been
employed with success by using a soft pencil on plain white wrapping paper. One-hole rubber stoppers serve to fit into the ends of the cardboard rolls to which the ends of the paper are pasted. The advantages are that the drawings or tables can be rolled back with ease, and time is saved by having the illustrations ready beforehand and in such a manner that they are fully explained.
