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i great premium of 
pounds offered by the British Parlia- 
of three hundred pounds was given to 
having furnished the theorems made use of 
in his theory. 
year 1773, Euler published, at St Petersburg, 
his great work on the construction and management of 
vessels. A new edition soon afterwards appeared at 
Paris, and at the desire of the French king, it was in- 
troduced into the schools of Marine, and a reward of 
ni 
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z 
a handsome letter from the celebrated Turgot.' About - 
the same time an Italian, an Engieh, and a Russian 
translation of it , and the Russian government 
presented Euler with a gift of 2000 rubles. 
Three of Euler's memoirs on the Inequalities in the 
motions of the nit crowned aoe n+ treed 
Academy of Sciences, e also gained the pri 
1770 ual 1772, by his perfection of the lunar haceys 
Having lost his first wife, by whom he had thirteen 
children, eight of whom died in early life, he was mar- 
ried a second time in 1776, to Mademoiselle Gsell, the 
too \ 
organs, he again lost his sight, and suffered much se- 
vere pain ‘from the relapse. 
ever, continued unabated, and in the course of seven 
he transmitted 70 memoirs to the Academy of 
Bt Pe . On the 7th of September 1783, after 
having amused himself with calculating: upon a slate 
the laws of the ascensional motion of balloons, which, at 
‘the attention of 
musing himself with one Pet teeters ar 
on a sudden, his pipe fell from his hand, and he expi- 
¢ stroke, in the 76th year of his age. 
iné him three sons, having lost his two 
in yon years tart ome Tw = 
of grand-chil were alive at 
time of his death. 
After along life, so snecessfully devoted to the sci- 
ences, Euler's was a widely extended. 
Besides being a f 
Theory of the Lunar Motions. > 
ledge was not limited to mathematics 
] vereed in ancient literature. 
eid from the beginning to the end, and he could 
even tell the first and last lines in every — of the 
edition which he used. Tih bate OF file weidarthene’ts 
F 
2 
nature the 
assiduity with which he pursued them, we cannot fail 
to be surprised at the : 
his lively and chearful. In his and reli+ 
Et cir ariee Sie apa 
ew e in 
he must have experienced both at. and St Peters- 
» never induced him to abandon the religious 
duties to which ee tatiana 
i ina form. — 
* voir Memoirs of the A 
are extremely 
behind kates fewer than 200 
order to fulfil a 
dy for 
hich he 
work contains many new views ; but as M. Fuss re- 
marks, it had no great success, as it contained too 
much geometry for musicians, and too much music for 
Methodus inveniendi lineas curvas maximi minimive 
ntroductio in Analysi itorum, Lausanne, 1744, 
2 vols. 4to. This work, whi 
‘was reprinted at Lyons in 1797. It was tra ine 
to French in 1796, by J. B, Labey, and published at 
~ Theoria motuum planetarum et cometarum. Beroli« 
ni, 1744. ' 
Opuscula varii argumenti. Berolini, 1746, 1750, 
1751, $ vols. in 4to. The tables of the sun and moon, 
which are sometimes to be found separately, form part 
of the Ist volume of this collection. As the three vo- 
jg make only 600 pages, they are generally found 
one. $70 wea 
4 
