Donkey milk even exist). In addition, the flavour and appearance of donkey milk have been found to be attractive to children. Equid (donkey and horse) milk can be considered a suitable substrate for probiotic beverage production. The use of fermented equid milk is an ancient tradition in central Asia, like koumiss or airag, a fermented mares milk very popular in Asia and Russia; but there are also traditional variants made from donkey milk. In Mongolia, where koumiss is the national drink, people have a saying that ‘kumys cures 40 diseases’. It is said that Cleopatra, Queen of Ancient Egypt, took baths in
Cleopatra the Alchemist said to have similar styles in their writing, both having grand imagery. Cleopatra is used as a character within the dialogue of the alchemical texts themselves. Cleopatra was a foundational figure in alchemy, pre-dating Zosimos of Panopolis. Michael Maier names her as one of the four women who knew how to make the philosopher's stone, along with Maria the Jewess, Medera, and Taphnutia. Cleopatra was mentioned with great respect in the Arabic encyclopedia Kitab al-Fihrist from 988. She is credited with the invention of the alembic. Also trying to quantify alchemy and its experiments, Cleopatra worked with weights and measures.