Here is a recipe for making fly-papers. Add 4 oz. of syrup or treacle to 1 pt. of water, and boil with 1 dr. of white arsenic. Steep squares of moderately thick blotting-paper in the liquid and allow to dry. The papers are to be kept damp while in use. It need hardly be pointed out that white arsenic is a deadly poison.

In making fly-papars, melt 1 oz. of powdered resin with 3 fl. dr. of colza oil (which need not be very pure) in a small pot set on the bar of the kitchen fire. When thoroughly melted, stir well, and apply while hot with a small varnish or paste brush to old newspaper leaves.