I was looking for another substance that I could pour on the tongue in a mound. Potash came to mind, although I wasn't sure at first exactly what it was. I contacted a Toronto company that sells it and from a brochure they gave me, learned that like salt, potash is the result of sedimentary deposits in ancient sea beds. Today it is mined underground and sold as fertilizer. It looks like chunks of pink pigment or some kind of generic food product. The fact that it is both crushed rock and food for plants made it suitable as an ambiguous substance to place on the tongue of a head. My intention in selecting something ambiguous was to provoke speculation about the nature and scope of what is consumed by human beings, whether as food or natural resources.
