ANCIENT ALLOTS AT «OSLAR. |3 



lead was thrown Tdowo by sulphate of soda. The super- 

 natant liquid was then precipitated by carbonate of soda: 

 and the carbonate of zinc, well washed and calcined, left 

 22*25 grs of oxide of zinc, answering to 18 grs of metalHc 

 zinc. 



The alloy of the altar therefore consists of 



Copper 6g 



Zinc 18 



Lead *.. 13 



100. 



Analysis of the alloy of the imperial seat. 



In the church of Goslar there is an arm chair, called the Thelniser> 

 kaiserstuht, ""^1- 



The colour of the metal is a pale copper red : its fracture 

 is porous: its spec. grav. is 8'087. 



200 grains of the alloy were treated with nitric acid. Analysis of it. 

 12»25 grs of oxide of tin were left. From the decanted 

 liquor sulphate of soda threw down 7*5 grs of sulphate 

 of lead. From the remaining liquid, after the addition 

 of sulphuric acid in excess, iron separated 185 grs of cop^ 

 per. 



This therefore is composed of 



Copper 92-5 



Tin 5 



Lead 2'5 



100^ 



Analysis of a large chandelier. 



200 grs were treated by nitric acid, and the solutioa di- Analysis of an 

 vided into two parts. '^^^'^ '^^^'^ 



In one of these sulphate of soda occasioned no precipi- 

 tate : but iron separated from it 84 grs of copper. 



The other half was treated as in the first analysis, and as 

 much oxide of zinc was obtained, as answered to 16 grs of 

 the metal. 



Consequently 



