Chemico- Galvanic Observations. 57 



highest opinion of your coarse composition a«d fisii oil yoa 

 made use of on the out-buildings, fences, &c. on the above 

 premises ; the great body and hard surface it holds out, must 

 be of the greatest preservation to all timbers and fences ex- 

 posed to open air and all weathers. It must also be of the 

 greatest service on plastered stucco, external walls, Sec. 



If any further attestation from me relative to the business 

 you did at the above premises can be of any service to you, 

 you will command, 



Sir, your obedient servant, 



West Lavant, near Chichester, Sussex, \\ T , KlLL 



Jr'ebrua v 7, 1805. » ' 



IX. Chemico- Galvanic Observations, co?nmi:nicated to the 

 National Institute of Italy . By M. I*. Bkugnatelli*. 



§ !• Pavia, Sept. 23, 1 S0$. 



Muriatic Acid may he obtained by Galvanizing Water uith 

 Gold, Platina, Iron.) and Oxide of Manganese, 



It is a long time since several chemists, who had turned 

 their attention to Galvanic experiments, discovered that 

 muriatic acid might be produced by these processes. Mr. 

 Simon, of Berlin, the first who made this curious observa- 

 tion, published it in the Journal of Gilbert in 1S01. He 

 made u^e of two tubes filled with distilled water. They were 

 closed at the bottom, and placed in communication by means 

 of a muscular fibre, and a gold wire was passed into each 

 tube through the corks j one of these wires communicated 

 with the positive pole of a pile rjf Volta, and the other with 

 the negative pole. At the end of twenty-four hours the 

 water on the z\:\c side of the pile assumed a yellow tint, and 

 it liberated a good deal of oxygen gas. Tbis yellow water 

 had the smell of the oxymuriatic acid; it whitened the 

 cork ; it reddened the tincture of turnsole ; it occasioned an 

 pflervescenee with the carbonate of potash, with which it 

 |fterwards yielded cubical crystals which decrepitated in the 



* An extract from Ossaniafam Gkimioo'Ottoanifhe, Sue. 



fire, 



