The engineer's conception of the Mackinac Straits Bridge is the subject for the cover of this issue of "Screenings". Lee Gregory, local librarian, provided a water color copy of this view and we were pleased to use it as a cover pic ture. The new bridge is going to mean much to the Straits country and will be a subject of interest during its construction. It will also be an attraction in the future years. We are proud to add this picture to the long list of unusual cover pictures of "Calcite Screenings".