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Quis in Arithmetica non stupet, eum tot difficultates superasse, quibus explicandis Villafrancus, Lucas de Burgo, Stifelius, Tartalea, vix ac ne vix quidem pares esse potuissent?"

It attracted so little attention, that nearly three hundred years elapsed before any European work on the subject appeared. In 1496 Paccioli published his book entitled "Arte Maggiore," or "Alghebra." In 1501, Cardan, of Milan, gave a method for the solution of cubic equations; other improvements were contributed by Scipio Ferreo, 1508, by Tartalea, by Vieta. The Germans now took up the subject.

Tartaglia's record of his conversation with Messer Juan Antonio, the emissary employed by Cardan, and of all the subsequent details of the controversy, is preserved in his principal work, Quesiti et Inventioni Diverse de Nicolo Tartalea Brisciano, a record which furnishes abundant and striking instance of his jealous and suspicious temper.

Montucla, Histoire de Math. i. 596, gives a full account of Ferrari's process. In the De Vita Propria, Cardan dismisses the matter briefly: "Ex hoc ad artem magnam, quam collegi, dum Jo. Colla certaret nobiscum, et Tartalea,

"Nam etsi Nicolaus Tartalea libris materna lingua editis nos calumniatur, impudentiæ tamen ac stultitiæ suæ non aliud testimonium quæras, quam ipsos illius libros, in quibus nominatim splendidiorem unumquemque e civibus suis proscindit: adeò ut nemo dubitet insanisse hominem aliquo infortunio." Opera, tom. i. p. 80. Quesiti et Inventioni, p. 129.