Memoirs of J. Bernoulli. 97 



in 17SS his excellency Count d'Anhault appointed Mr. 

 Bernoulli one of the profeffors who inftrutSt the Imperial 

 corps of noble land cadet;, charging him to teach algebra 

 to the two firft clafles. In this office he diftinguiflied liim- 

 fclf by much zeal and attachment to the duties it impofed. 

 He eno-ao-ed, amono- other things, to make for the ufe of 

 that corps an extract from Mr. Eider's Algebra; but death 

 prevented him from commencing that work. 



In 1739 Mr. 'Bernoulli married the ydungeft daughter of 

 Mr. John Albert Euler. '1 his marriage, which promifed to 

 the young couple durable felicity, and which united two 

 names equally dear to the fcienccs, and refpectable in the re- 

 public of letters, was diffolved, two months after it was fo- 

 lemnifed, by the tragical death of the hufband, who was 

 carried off by a ftroke of the apoplexy on the 3d of July 

 the fame year. A refidence in the country, and the conve- 

 nience of bathing every day in the Neva, had made him re- 

 filmc a tafte for that practice and the exercifc of fwimmiug, 

 which is fo falutary, but lb often fatal. He was well accuf- 

 tomed to the art, and consequently had no fear of any un- 

 lucky accident; but whether he had neglected to dip his 

 head firft, or had bathed too foon after dinner, during the. 

 operation of digefiion, which to him was difficult, or whe- 

 ther the germ of the malady had been already in his confu- 

 tation, he fuddenly became infcniible and motionlefs ; and 

 though he was alrnoft immediately drawn out by his bro- 

 ther-in-law, and though all the ufual methods were tried, 

 affiftance was u'felefs, and the phyficians unanimoufly de- 

 clared that he had been (truck with a ftroke of the apo- 

 plexy. It has been already obferved, that Mr. Bernoulli 

 >1 a weak and delicate constitution. In the autumn of 

 the year 1787 he was attacked by a nervous fever, which 

 expofed his life to great danger. He, however, recovered; 

 and it is to be prefumed that his conflitution would have 

 been diablWhed, and that it would have been able to refift 

 the feverity of the climate of Ruffia, if Providence had not 

 Vol. III. il difpofed 



