Analysis of the New-Jersey Ores of Zine. 325 
There were heated at the same temperature, in a cruci- 
599 
ble “ brasqué, 
franklinite, - - - - 10¢r. 
i a eR sae he 4 
alumine, - - - = - 1.50 
lime,*\-) = = <= 1.40 
——_— 
Wowihp: janie ia! tussles a 16.90 
There was obtained a button, weighing 12.77 
Loss) ie saetinest nig nines ScdS 
which was owing to the volatilized zinc, the oxigen of the 
iron, &c. 
The fusion was perfect; the metallic button weighed 
g4. 6 it flattened under the hammer, and the fracture wa 
granular, and of various shades. The scoria was compact, 
vitreous, transparent and green; it weighed 8.17 
bstract from it - - - - - = 6.90. 
There remains - - 1 
which represents the oxid of manganese that it contains. 
~The g4. 6 of the “fonte” correspond almost exactly with 
the 0.66 of the peroxid of iron discovered by analysis ; the 
metallic button ought to contain a little manganese, in the 
‘State of an alloy. 
~The alloy obtained in the first trial, ought thento be com- 
posed nearly of 
~~ Tron, -. - + - 4.60 at most, - - =< 0.814 
Manganese, - - 1.05 at least, - - - 0.186 
ee 
collection, the pieces in which the red mineral prevails, and 
Vou. IL.....No. 42 
