^* Roughly 4.2 milliliters per day, according to a table in a paper by Mattoni and Sullivan, entitled “Synopsis of Weight and Volume of Waste Product Generation from All Sources in the Closed Environment of a High Performance Manned Space Vehicle.” That is just under a teaspoon of skin oil, an equivalency made with the help of a recipe conversion table. Employed in tandem, the two tables would enable the deranged or geographically isolated baker to substitute sebum for vegetable shortening or calculate the equivalent of a cup of flour in desquamated epithelium.