318 



INDEX. 



College of Physicians, 161. 

 On the 26th of July his 

 mother dies, x., 162. By 

 the friendship of a drug- 

 gist he is introduced as a 

 physician to the Senator 

 Sfondrato, whose sick child 

 he cures, 163165, and 

 whom he wins for a warm 

 friend, 166. At this time 

 he believes and writes that 

 he has cured cases of con 

 sumption, 168. 



1538. At work on his Practice of 



Arithmetic, 171, which 

 next year is published, 172 

 179, with his portrait on 

 the title page (title to Vol. 



1539. I-, vignette). On the 

 second of January in this 

 year, Tartalea at Venice 

 is applied to on the part of 

 Cardan for certain mathe- 

 matical rules known to 

 him, which it would be 

 advisable to publish in 

 the Practice of Arith- 

 metic, 222, 227- Tartalea 

 replies uncivilly, and there 

 ensues a correspondence, 

 227, 246, which results in 

 an interview on the 25th 

 of March, at which Tar- 

 talea communicates to 

 Cardan the rules known to 

 him under a vow of secrecy, 

 246253. Tartalea, how- 

 ever, fears that his secret 

 will be divulged, and is 

 uneasy until he receives 

 from Cardan a published 

 copy of the Practice of 

 Arithmetic, sent from 

 Milan on the 12th of May, 

 253258. Tartalea's dis- 

 content grows during the 

 remainder of the year, and 

 by the succeeding January 

 becomes permanent, 258 

 264. In this year, 1539, 

 Sfondrato, and other 

 friends, including the 

 Marquis d'Avalos, force an 

 entrance for Cardan into 

 the body of the Milanese 

 College of Physicians, 173, 

 174. Appended to the 

 Practice of Arithmetic is a 

 manif es to, 1821 84, calling 

 attention to the author's 

 many unprinted works. 

 In consequence of this, 

 Osiander, a scholar of 

 Nuremberg, and Petreius, 

 a printer, offer respectively 

 to edit and publish any- 

 thing he will send, 184, 



which is the beginning of 

 his fame, 185. 



1540. A Milanese patrician, An- 



tonio Vimercati, gambling 

 with Cardan, and losing to 

 him about a gold piece 

 daily, 201, 202 ; other means 

 of livelihood fall into abey- 

 ance, during this year and 

 the next, 



1541. when he is rector of the 



College of Physicians, 200 ; 

 writes little, but studies 

 Greek, and gambles. In 

 the year 



1542. at the end of August, Vi- 



mercati forswears dice, 202, 

 and Jerome is left in sud- 

 den penury. He goes then 

 to his friend the Marquis 

 d'Avalos, who is at Flo- 

 rence, and on the way 

 home visits Sfondrato, who 

 is now governor of Sienna, 

 203. 



1543. On the 25th of May his 



second son, Aldo, is born 

 (vol. ii. 26), 205. The Uni- 

 versity of Pavia, driven by 

 war to teach at Milan, 

 cannot maintain profes- 

 sors, and offers the chair 

 of medicine to Cardan, 204. 

 He accepts it, since it will 

 not take him from home. 



1544. The university returning to 



its own town, Cardan, 

 through Sfondrato's influ- 

 ence, 206, is asked to re- 

 tain his chair, but intends 

 to decline. On the night 

 before giving in his refusal 

 his house tumbles down. 

 Accepting the omen, he 

 revokes his determination, 

 and goes to Pavia as Pro- 

 fessor of Medicine, with a 

 salary of 240 gold crowns, 

 205. 



1545. The information obtained 



from Tartalea, having de- 

 veloped since 1539, by the 

 continued application of 

 geometry to algebraical in- 

 vestigations, 274, in this 

 year Cardan publishes, 

 through Petreius of Nu- 

 remberg, his Algebra, 272, 

 an original work, in which 

 the whole doctrine of cubic 

 equations is first made 

 known, and many great 

 improvements are made in 

 the science, 275; 269276. 

 This work following upon 

 a series of other publica- 

 tions, 277284, establishes 



