Mummy, in horticulture, signifies a kind of wax employed by gardeners, in grafting and planting the roots of trees. It is prepared as follows: Take one pound of black pitch, and a quarter of a pound of turpentine, mix them in an earthen pot, and set the whole on fire in the open air: the mixture should be alternately quenched and lighted, till all the nitrous and volatile parts be evaporated, when a little common wax is to be incorporated with the composition, which is now fit for use.