A History of the Conic Sections and Quadric Surfaces by Julian Lowell Coolidge

By Julian Lowell Coolidge

A vintage review of conic sections and quadric surfaces.

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To A. D. 700, Arab traders monopolized western trade in ginger, conveying it in sealed earthenware jars by caravan through Asia Minor, or on ships sailing through the Arabian Sea to Egypt, leading the ancient Romans and Greeks to identify ginger as an Arabian plant. The Ayurveda calls dried ginger the “Great Medicament” against colds, coughs, rhinitis, bronchitis, and indigestion. It is prescribed for abdominal distention, colic diarrhea, and nausea. Infused in hot water it causes sweating and is used for breaking fevers.

Strongly scented, and with a slightly astringent taste in their sweetness, mangoes are rich in vitamin C. They are used in the Indian diet throughout the year. In summer when the body is losing salt through perspiration raw mangoes are sliced and eaten with salt, or they are pickled in oil and kept for the winter months as a useful antidote to colds. But it is not just the fruit of the mango that is used in Ayurvedic medicine. Its twigs, being antiseptic, are used like toothbrushes, for oral hygiene.

Mango (Mangifera indica) Family: Anacardiaceae Sanskrit name: Amra Hindi name: Aam Our fairest one, Beauty of the garden, O finest fruit Of Hindustan. Moghul Emperor Babur, Babur-namah (1525) Boy, cut these mangoes and prepare them in slices, because in that way they have, a better taste, and the chief thing is to soak them in wine, like nectarines. Garcia da Orta, The Simples and Drugs of India (1563) With its distinctive shape and succulent golden flesh the mango is perhaps India's best-known fruit.

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