•CIENTIFIC NEWS. %3h 



situations in which they are found. He thinks them of very 

 recent origin, since they occur only in calcareous mountains 

 of secondary formation, and near their surface; and be- 

 sides he has found in these mountains petrified roots, wood, 

 and animal substances. In several fragments he has met 

 with rhomboidal crystals passing in gradation from carbon- 

 ate of lime to nearly pure silex. 



You will find likewise in my journal a paper by Mr. Rit- Muriatic acid 



ter, concerning the muriatic acid and soda formed by the ar ?4 soda , form " 



7 ° ;" ■ ' J ed by galvan- 



two poles of the pile. He is pursuing his experiments on 



this subject ; and Messrs. Berzelius and Hisinger are doing the 



same, for they observed the formation of these in 1802, 



and consequently before Pacchiani. 





Autographs from Sto?ie Blocks. . 



A method of printing from designs made on stone was Printing from 

 mentioned in the last volume of our Journal, p. 158. I ^| raphs on 

 am informed, that the circular letters from a snuff manu- 

 factory at Offenbach to its correspondents, are printed in 

 this manner; and that a Mr. Reu ter, a painter, of Berlin, 

 was the inventor. 



Art of Swimming. 



A society has been formed in Denmark for improving and Swimming s'»* 

 extending the knowledge of the art of swimming; an art c ^ k m Dea " 

 certainly of great utility with respect to health, cleanliness, 

 and safety, and particularly valuable to a maritime nation. 



Description and Chart of the Faro Islands. 

 Mr. Loevenoern, a distinguished officer in the Danish Chart and de- 

 navy, has lately published a new chart of the Faro islands, ^^isiands! 

 X particular and interesting description of this little known 

 portion of the Danish dominions is given with it. 



Scientific 



