Got this from routerforums,credit goes to Canuckgal there, Some good vintage material,somewhat dated but hey its free, http://www.evenfallstudios.com/woodworks_library/woodworks_library.html#Woodworking
Just at random I opened Woodwork Joints; How they are Set Out, How Made and Where Used and perused several of the joints described therein, and came upon something called the Bevelled Dovetailed Half Lap (fig. 47).
Am I nuts, or is that joint physically impossible?! How does one push the fat end of the male portion of the dovetail through the skinny end of the female end? Is this some M.C. Escher optical illusion?
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