156 A, A. Hayes on Native Iron from Liberia. 
sandy grains, and -some dark, nearly black particles had fallen. 
After collecting and drying these substances, they were placed 
under the microscope, which showed the heavier -bodies to be 
quartz, with some facets-and fragments of octahedral crystals 
proved to be magnetic iron ore. ‘he light body was silicic acid 
rendered gray by iron oxyd. ' 
Chlorine was passed into the filtered iron solution, which after 
y gaseous ammonia passed into it in excess. After being heated 
by a vapor bath, the precipitate was separated by filter and 
washed. ; 
The filtrate and washings evaporated were reduced to a dry 
mass, which afforded a minute quantity of soda and lime; no 
other substance was present. : 
eparate parcels of the precipitate by ammonia were used for 
the detection of phosphorus, arsenic, and boron, alumina and 
other earths and oxyds: a little silicic acid only was found. 
Fifty grains of the filings of the iron were wet with a few 
drops of perfectly caustic soda solution, mixed hastily with crys- 
tals of pure nitrate of soda and chlorate of potash, and heated in 
a nearly closed platina.crucible rapidly to bright redness in twenty 
minutes: no deflagration occurred and the fused salts were col- 
SS 
orless. 
' The crucible after cooling, digested in a closed vessel with re- 
cently boiled pure water, gave its soluble part to the water. After 
subsidence the clear fluid was added to a dilute saturated solution 
‘of lime in ammonia in one vessel, and to a dilute solution of ba- 
rytainanother These vessels were closed and left twelve hours 
aud then presented nearly transparent solutions, no precipitates 
had fallen, but both showed the presence of silicic acid. ‘Ihe 
absence of sulphur and carbon was thus proved, and other trials 
confirmed these results, 
_ Analysis.—In the following analysis and in repetitions, differ- 
ent slabs of the nretal were used so as to obtain an average per- 
_ The equivalent of ptire iron being 28, the deposits of coppet 
should have weighed 29-71; an accordance as near, as these eX- 
periments allow, when more than one form of matter is present. 
_ 0°32 the precipitate consisted of angular portions of quartz, 
ragments of crystals of m tic iron ore a 
and a flock of silice’ 
oi 
being heated and cooled, was precipitated in a partly closed flask ° 
5 ee, See es 
