The collection amounts to .05 cubic feet and contains a sliding chart which is meant to fit in a larger container. Together they measure 3.5x8”. In the container there is a tall, thin vertical hole which displays information found on the slider. Along the top of the slider are listed the names of several cities in Michigan, and below each city name are 20 numbers. The numbers represent the distance between the city listed on the slider and each city whose name is listed along the slot on the container. Both the slider and the container are in poor condition, heavily stained and significantly yellowed. However, almost all the text is legible with the exception of some fading obscuring a few small parts of the map on the reverse side. The container is coming apart with an opening exposed along the top horizontal edge.