Exhibitionboard, compo-board, wall-board, or any of the various boards generally used for wall surfaces may be used as a backing to give strength to the cork. Care should be taken to get a good quality of board which will not warp seriously. The cork composition can be glued to the wall-board and then the map pasted on the cork. A piece of wrapping paper should be pasted on the back of the wall-board at the time the map is mounted so that the shrinkage of the map may be equalized. The edge of the cork mounting may be bound

Country (Jtnileinan

Fig. 189. Distribution of the Field Service of the Department of Agriculture, February i,

A pin map cannot be excelled for conveying information like this. Note the great activity of the Agricultural Department in the South

MAPS AND PINS

llw) _ . . Alily Shoes

Fig. 190. The Use of Pin Maps in Advertising

A large shoe manufacturing company used this illustration in an advertisement announcing that 3,800

merchants were ready to show the latest fall and winter models of shoes In order to make the dots stand out distinctly it would appear that agencies in any State have been sho-mi

as uniformly distributed over the State. Actual exact locations would be almost impossible to show

unless a much larger map were used

with a cloth tape as suggested for straw-board mounts, or the whole built up combination may be framed with picture framing but without using any glass covering. The cork composition used should be Vs-inch thick. Maps backed with cork composition and used with glass-head pins having needle points will permit almost unlimited puncturing from frequently moved pins. If the map is mounted on cork composition the sharp-pointed pins are easily pushed in and removed, yet the record is always accurate because the pins cannot be knocked out.