Cardano

Following the operating principle of the most commonly used universal joint, the input shaft and the output shaft both terminate in yokes that are oriented in mutually perpendicular planes. The branches of each yoke are pinned to a cross connector so that each yoke can pivot about its beam of the cross. This mechanism was employed in the sixteenth century by Italian mathematician Geronimo Cardano, who used it to maintain a shipboard compass in a horizontal plane, regardless of the movement of the ship. Consequently it is often called a Cardan joint. 

Less than half a century after Balboa had stood silent on a peak in Darien, facing the unknown ocean, a famous Italian scholar and poet, Julius Caesar Scaliger, or della Scala, recorded the presence there of an unknown noble metal. In 1557 he made what is probably the first definite allusion to platinum. Girolamo Cardano (1501—1576), in his well-known work On Subtlety, had defined a metal as a substance which... 

Nancy Siraisi, The Clock and the Mirror Girolamo Cardano and Renaissance Medicine (Princeton,... 

Grafton and Siraisi, Cardano and Medical Astrology , esp. 85 Siraisi, Medieval and Renaissance Medicine, 68-9, iii, 123 Brian Copenhaver, Symphorien Champier andthe Reception of the Occultist Tradition in Renaissance France (The FFague, 1978), esp. ch. i. 

Ewich, Duetie of magistrates, sigs. 3, 4, Ewich gave Cardanos De rerum varietate zs his source. 

Laurinda Dixon, Perilous Chastity Women and Illness in Pre-Enlightenment Art and Medicine (Ithaca, NY, 1995) King, Hippocrates Woman, ch. lo Nancy Siraisi, Girolamo Cardano and the Art of Medical Narrative , Journal of the History of Ideas, 52 (1991), 581-602. On medical cases in a legal context see esp. Pomata, Contractinga Cure. 

Cardano s Cosmos The Worlds and Works of a Renaissance Astrologer (Cambridge,... 

Girolamo Cardano and the Art of Medical Narrative , Journal of the History of... 

For a study of the role of ancient texts in the practice of Renaissance astrologer Girolamo Cardano, see Anthony Grafton, Cardano s Cosmos The Worlds and Works of a Renaissance Astrologer (Cambridge, Mass. Harvard University Press, 1999). 

Niccolo Fontana, nicknamed II Tartaglia "the stutterer" (1499-1557). Girolamo Cardano (1501-1576). 

The gyroscope, or universal or Cardano s suspension at the intersection of each set of circles, where six mechanical bearings allow complete freedom of rotation about three axes. The rotor s motion is maintained electrically to have constant angular velocity the rotor will maintain its spin orientation unchanged in "inertial space" that is, with respect to the "fixed stars. 

When Vasco returned, he found me at my side of the big desk behind a pile of every book on cryptography in the Maestro s library—Roger Bacon, Johannes Trithemius, Girolamo Cardano, Leon Battista Alberti, Giovani Porta, Blaise de Vigenere. Al-Kindi was there, too, but I can t read Arabic. Needless to say, I had made small progress with those I could read. 

The simple Cardano form used by this Algol person is vulnerable, the Maestro said, rubbing salt in the wound. Had he followed the subtler recommendations of the sagacious Monsieur Vigenere and used the plaintext to encode itself, then even I might have failed to break it. As it is, I showed it all to Filiberto Vasco. He will explain the technique to you. He stretched his lips in a helpful smile. 

Cardano s formula The roots of a polynomial of degree n = 3 are given by the cubic formula. The number of real roots of a cubic equation depends on the sign of the polynomial discriminant... 

Palissy, Discours, 2 11, 105 (Cameron)/24, 81 (la Rocque). See also Ernest Dupuy, Bernard Palissy (Paris Societe Fran aise d Imprimerie et de Librairie, 1902), 149. For Palissy s debt to Cardano, see Pierre Duhem, Leonard de Vinci, Cardan et Bernard Palissy, Bulletin italien 6(1906), 289-319. 

A new C-allyl cardano 1 derivative formed by Claisen rearrangement of an allyl ether namely, 2-allyl-3n-pentadecyl-6-tert-butylphenol had comparable antioxidant properties to the well known compounds DBHA and BHT, respectively 2,6-di-tert-butyl-4-methoxyphenol and 2,6-di-tert-butylphenol [252], The 2-allyl compound is related in properties to the precursor 2-tert-butyl-5n-pentadecylphenol (see, e.g. p. 542 in ref.[l] and [253] and to the hindered phenols [254],... 

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