577 



SILVER WORKING. 



8houldbe 



of standard silver, 

 manufacture of 



SILVERING. 

 For 



673 



salt i 



invariably be used Th* 1^1 ^ tft- U "I 1 "' 6 ' dlst illd water should 



with the 



1JS5XK04/ ' nn " e .. ln 1 1850 ^ese values were raised to 7 259 8^1 ai 



3 ' made erfecU cl " 





yield only 8 oz. in 5000 Ib, of in , h " <* mne8 



worke.1 ia the reign of Charlesl, yielded 80 o>mcf 



pro^rtion of the lead-mines of the nmhtf EnrfZt" 



ton ; but even when- the proportion of silver t K f 



hag been found profitable t,, 8I ^te i ' Ti. 



from the ore by P various proce^ by nltni"^ T 



to Marate the sulphur anTotte'r volatHe m^ 'T' roastin 8 8 



' 



2 tl " nc f 8 P 61 " 

 than thi "' jt 



^o P caton,wtntheadHioofn,, 



\\ li-n silver ix iwue,! for coin, it in nlways alloyed with 

 m..,.n of hd n U prf xluced by oSw^ 

 of standarrl mlver of the English coinage contains 



ret the liquid. After remaining thus a few hours th 



the whole of the processes are effected on the under surface 



, 



i isi 



an effect which can hardly be paralleled in any other manu 

 The surface .soften richly cut and diversified, and the S1 " 

 be made to appear at any spots selected by the workman The"uerinff 



