A. A. Hayes— Red Oxide of Zine of New Jersey. 195 
meme proteride 22 ra ee 93°48 
PARANCHS PPOWMGS SSS. SU ee at 5°50 
Seales of specular iron __.____- O44 
Ferric deutoxide ___.__- -. 0°36 
OBE: st ana dee Gee des Rass 0°22 
The loss is excessive, and was then supposed to arise from 
body undetermined. Resort to the more precise mode of in- 
dependent separation did not diminish this loss, and samples 
Teserved have enabled me to account for it in part, and add 
silica, calcium oxide and another metal to the number of those 
before known to be present. In resuming this subject, the ore 
bodies which can be detected without the aid of the spectroscope. 
The red samples of this ore may be considered as a mixture of 
Pure anhydrous zinc and manganous oxides in ninety-nine 
parts, and foreign intrusive bodies one part in one hundred 
Parts, and in some cases the latter do not form half this weight ; 
tnaking the one hundredth part scales of specular iron, ferric 
deutoxide, silica, molybdous oxide, calcic oxide and HO, which 
ave been determined. 
The absence of the higher oxides of manganese was proved 
by the fact that the clean mineral of more than four pounds 
1 pPears, and hence doubtless the supposition of its occurrence 
aS arisen. 
If we sus f ared ore in diluted sul- 
: pend large fragments of prep f 
Phuric hydrate sodeetned in a tall jar, the descending stria of 
the Solution forming contain scales of specular iron, from which 
the brilliant investing matter has been dissolved. Removing 
and drying the fragments, after partial solution, the saline 
* o . . 
n the io! chlorhydrie acid was going on, it was observed 
— chlorine ad Saapharcuneish was ‘eaite for weeks in the stronger solutions 
(SN this acid with 
