168 Miscellaneous InteUigencc 



duced to suppose, therefore, that titanium generally accomps-' 

 nies the ojddulated iron in nature, and that this compound i? 

 not peculiar, as has been supposed, to volcanic countries. 

 Berzelius found titanium in the iron ore of the Isle of Elba. 



13. Chemical Prize Subjects.' — The following subjects have 

 been proposed by the Royal Academy of Copenhagen : 1. Niim 

 principium illud Scytodepsicum, quod ope caloris in materiis 

 vegetabilibus formatur ejusdem est naturae ac illud, quod ex 

 galla, ex cortice querciis, etc., extrahitur, an ab hoc discrepat ? 

 An et quatenus in arte coriara adhibiri potest I Et quse sunt 



_ conditiones, quibus satisfieri debet, ut maxima quantitate produ- 

 cantuv ? 



2. Mutationes chemicasr, quse in foeno eveniunt, dum inter 

 fermentationeih colorem badium contrahit, accurate examinare ; 

 nee non investigare, anne ex notitiis rei chemicis indi compara^ 

 lis utiles queedam regulae de confectione et usu talis foeni deduci 

 possint ? 



The prizes attached to these subjects are each of 100 rubles. 

 The papers may be written in Latin, English, French, German, 

 Swedish, or Danish, and are to be sent to M. H. C. Orsted, se- 

 cretary to tlie Academy, by the month of December of diis year. 



14. Strength of ^t7ia Wines. — The following wines were fur- 

 nished to me by Mr. Ridgway. The specific gravity of the al- 

 cohol, of which the proportions per cent, are given beneath, is, 

 825 at 60°' F. 



iEtna red contained 18.9 percent. 



iEtna white 1S.16 ditto 



jEtna Sercial 19. ditto 



iEtna white Falernian 18.99 ditto 



iEtna red Falernian 20. ditto. 



M. F. 



15. On the Oxidation of Silver and Copper. — In a letter from 

 S. Lucas, Esq. to Mr. Dalton. 



Sheffield, May 31, 1815. 

 De.\r Siu,— When I had the pleasure of seeing you in Man- 



