SCIEXTTFIC NEWS. | g3 



Second prize. '' What are the true characters a:id principal Prizeque*. 

 causes of that disorder which, though not confined to Poland^ ^'"'"*" 

 is neveriheless called Flica Polonica? Are there any methods 

 oi" curing it with more success than by those hitherto known 

 and employed ? and what are those methods ?" 



The prize is ICO gold ducats of Holland; and the concur- 

 rence is open till the first of September I8O7. 



The third prize. " What are the principal maladies of ve|te*- 

 tables, and what is the true analogy between those and the 

 disorders of animals ?" 



The prize is 100 a;old ducats of Holland; and the concur- 

 rence is open till the first of September 1808. 



The cla-^s of Mathemvtical Societies of the same academy 

 proposed the foUowino; pnze : 



*' Suppose a canal from w hich flows per minute or second a 

 quantity of water nt. through a transverse section of given 

 width and d?pth, terniiuated by two sides. This being ad- 

 mitted, if fr;5m one bank or side to the other there be con- 

 structed iij the section a dyke or obstacle in which an aperture 

 cf given dirnei^-sions be made for the efflux of the water; it is 

 demanded according to what law, the water elevated by means 

 ©fihe uljitacle, will be forced to enlargeitself, not only near the 

 dyke, but also in pioceodini!; up the canal. It is desired that 

 formula may be aiTorded saiTiciently general to be applied to 

 the efflux, not only of the same quantity ni, but also any 

 other quantity wi 4- -r. The theory and experiment, not being 

 exactly corresponding with each other, it will be required that 

 ftie necessary corrections should be made to the formulae, and 

 that it be proved by facts and observations how nearly they 

 approach the truth.'* 



The pnzQ is 100 gfild ducats of Holland ; and the concur- 

 ycncc is open till the first of September 1805". 



The class of Moral and PoUticul Sciences have proposed as 

 their first prize : 



" As we see the mathematical and physical sciences make 

 daily advances, and become enriched with new discoveries, it 

 is demanded : 1st. — ^Vhy the same does not happen with re- 

 gard to the moral sciences? 2d. — Among the different bran- 

 ches of these sciences, are there not some which are capable 

 of g)-eater porfeciiun ? and what arc they ? 3d.— To what point 



are 



