262 Life of the Duke de Chaidnes, 



GliNUS III. 



Of the Sanguiferous System. 



SPECIES. 



1. Capillariummolus retro- Retrograde motion of the ca- 



gressus, pillaries. 



2. Pnlpitatlo cordis. Palpitation of the heart. 



3. Anhelutio spasmodica. Spasmodic panting. 



[To be coiuiiiued.] 



XXXIX. Life of the Duke de Chaulnes. 



IVliCHAEL Ferdinand d' Albert d'Ailly, duke de 

 Chaulnes, peer of France, lieutenant-general of the king's 

 armies, his majesty's governor and lieutenant-general of 

 the province of Picardv, and reconquered countries, Artois, 

 Sec, was born at Paris in 1/14. We shall here only 

 consider the duke de Chaulnes as a man of science, and 

 relatively to the arts uhich he cultivated with so much 

 success ; taking our principal trails from the very elegant 

 life of this nobleman, given by M. de Fouchy, one of the 

 most celebrated members of the Academy of Sciences. 



After a long series of military services, which obtained 

 him the most distinguished honours from a just and bene- 

 ficent sovereign, the duke de Chaulnes retired, and dedicated 

 the whole of his leisure to the cultivation of the arts and 

 sciences, for which his mind was eminently qualified by 

 peculiar talents. He procured a very large collection of 

 scientific books, of instruments for making experiments 

 in natural philosophy and mechanics ; he arranged a most 

 extensive cabinet of the subjects of natural history; and he 

 built himself a laboratory to enlarge this collection by a 

 nunjber of his own inventions, which were daily produced by 

 bis fertile mind. He applied himself with creat assiduity to 

 dioptrics, and the improvement of mathematical instruments, 

 especially those which belong more particularly to astronomy. 



In 1 755 he published a Memoir, which contains experi- 

 ments relative to an ariicle m the begmning of the fourth 

 book of Newton's O: tics. 



The great English philosopher had rcinarkcdj that in a 



dark 



