Abstract: The present invention relates to an easel used to display sheets of paper held to a backing plate by a means for releasably securing the sheets of paper along its upper marginal edge and a means for securing the sheets of paper along its lower marginal edge. An operator advances the display by pulling on the upper marginal edge of the outermost sheet of paper, causing the paper to be released. Gravity pulls the sheet of paper thus released down, exposing the next adjacent sheet of paper. The means for securing the sheets of paper along the lower marginal edge of the backing plate holds the paper in a convenient position of rest while the next sheet of paper is displayed.

Abstract: A calculator for determining optimum pavement design comprising a pair of slidable members and a plurality of scales associated therewith for determining the Design Traffic Number, Structural Number, depth requirements and costs.