French Nutiojial Institute. 279 



has seen a proof of this fact ; and the explanation he has 

 given of it is extremely natural. 



This memoir is terminated by the description of a ne." 

 lamp, so constructed as not to admit of any direct ray 

 being seen, and yet to give the most equable and plcasaui light 

 in every corner of a large saloon, without throwing auv 

 shade, although the reservoir for the oil is circular, and 

 the cylinders which distribute the light are placed in the 

 centre. 



We should j/ive but an imperfect idea of the labours of 

 the class, if we omitted to speak of the particular works 

 of each of the members ; but the bounds wc have prescribed 

 to ourselves not allowing us to enter into any particular 

 detail, we can only barely mention the reports upon the par- 

 ticular Solutions of Differential Equations and Equations of 

 Differences, presented by M. Poisson ; on the new Demonstra- 

 tion of the Principle of the Virtu4[ Velocities, by M. Ampere ; 

 on a new Method of raising Water to a Great Height, by 

 M. Baader, engineer to the king of Bavaria; on the Expe- 

 riments of M. Peron, made upon the Physical Strength of 

 Savages compared with that of Europeans, and from which 

 he has drawn this result, which will surprise many, — That 

 there is no comparison in this respect between the civilized 

 man and the savage, and that the difference is completely in 

 favour of the former. 



Among the inventions approved by the class, wc ought to 

 mention the spinning-wheel of M, Bellemere, uhich enables 

 many industrious persons to double their work : the loom 

 for wrought and finished stuffs, on account of the simplicity 

 of its operation, has been thought worthy to be kept as a 

 njodcl, and of a reward from government to AI. iJivey, its 

 inventor: the stocking loom of M. DAulry, the reporter of 

 which stated its advantages with so much precision to the 

 class, that he was ordered to print his report in order to 

 serve as a history of the art: lastlvj another slocking loom 

 of M. Favrcau Bouillon, which has reduced ail the labour 

 to the dimple balancing of two leyers; an advantageous 

 improvement, which admits of this machine being easily 

 •.VI ought by weak persons, or such as have only one arm. 



Since 



