The old medical authors abound in narratives describing the longings of pregnant women for natural and unnatural foods. This affection was commonly called _pica_, sometimes _citra_ or _malatia_. Schurig, whose works are a comprehensive treasure house of ancient medical lore, devotes a long chapter (cap. II) of his _Chylologia_, published in 1725, to pica as manifested mainly, though not exclusively, in pregnant women. Some women, he tells us, have been compelled to eat all sorts of earthy substances, of which sand seems the most common, and one Italian woman when pregnant ate several pounds of sand with much satisfaction, following it up with a draught of her own urine. Lime, mud, chalk, charcoal, cinders, pitch are also the desired substances in other cases detailed. One pregnant woman must eat bread fresh from the oven in very large quantities, and a certain noble matron ate 140 sweet cakes in one day and night. Wheat and various kinds of corn as well as of vegetables were the foods desired by many longing women. One woman was responsible for 20 pounds of pepper, another ate ginger in large quantities, a third kept mace under her pillow; cinnamon, salt, emulsion of almonds, treacle, mushrooms were desired by others. Cherries were longed for by one, and another ate 30 or 40 lemons in one night. Various kinds of fish--mullet, oysters, crabs, live eels, etc.--are mentioned, while other women have found delectation in lizards, frogs, spiders and flies, even scorpions, lice and fleas. A pregnant woman, aged 33, of sanguine temperament, ate a live fowl completely with intense satisfaction. Skin, wool, cotton, thread, linen, blotting paper have been desired, as well as more repulsive substances, such as nasal mucus and feces (eaten with bread). Vinegar, ice, and snow occur in other cases. One woman stilled a desire for human flesh by biting the nates of children or the arms of men. Metals are also swallowed, such as iron, silver, etc. One pregnant woman wished to throw eggs in her husband's face, and another to have her husband throw eggs in her face. In the next chapter of the same work Schurig describes cases of acute antipathy which may arise under the same circumstances (cap. III, "De Nausea seu Antipathia certorum ciborum"). The list includes bread, meat, fowls, fish, eels (a very common repulsion), crabs, milk, butter (very often), cheese (often), honey, sugar, salt, eggs, caviar, sulphur, apples (especially their odor), strawberries, mulberries, cinnamon, mace, capers, pepper, onions, mustard, beetroot, rice, mint, absinthe, roses (many pages are devoted to this antipathy), lilies, elder flowers, musk (which sometimes caused vomiting), amber, coffee, opiates, olive oil, vinegar, cats, frogs, spiders, wasps, swords.