1927 invitation to a "miscellaneous shower" with a recipe for Fly Spray

Folded typed invitation "to a miscellaneous shower in honor of Mr. and Mrs. Frank Reed..." and a well-fitting square of paper found in (but possibly not original to-) it. With original stamped and postmarked cover addressed Clairton, PA. The Fly Spray recipe calls for coal tar and whale oil among its ingredience and will make enough to protect the whole town. Kind of a nice, funny thing.