《农桑辑要·果实·梅、杏》
作乌梅法：也是在梅核刚长成时摘取下来，放入笼中，在烟囱口上熏烤，等到熏干，便算做好了。
作乌梅：亦以梅子核初成时摘取，笼盛，于突上熏之令干，即成矣。
Method for making black plums: Also pick the plums when the plum kernels have just set, place them in a cage, and smoke them at the opening of the chimney. When they are smoked dry, they are finished.