T. S.Hunt on Euphotide and Saussurite.. 345 
This feldspar is completely decomposed by heated sulphuric acid, 
and contains a large proportion of lime, characters which show 
it to be labradorite or an allied varie 
Two Specimens of saussurite were selected for analysis, the 
bluish-white variety from the first mentioned euphotide having 
and consisted of soda with but traces of pain The results 
Were as follows: 
i i. Oxygen VIL. Oxygen. 
Silica, 43°59 23°25 48°10 25°65 
27-72 13°95 25°34 11°94 
Peroxyd of iron, 2°61 4g 3°30 ‘99 
Lime, _ wal 5°63 12°60 3°60 
esia, 2°98 1:19 6°76 i 
a 08 “80 3°55 ; 
Loss by ignition, 6 
100-04 10031 
rea elec thetsd sulphuric acid remoyed mips traces of 
‘mina and lime from the pulverized saussurite, which was 
boverer v artiall e acid after having been 
aly en at y ecompose by this & 
e ardness and ‘specific gravity of saussurite assign i 
me he epidote, Bam ee 8 erg ie recently published ie 
Ses of six varieties of lime-alumina epidote or zoisite, vary- 
tein density from 3 ‘25 to 3°36, and finds the oxygen ratios of 
bo totony » peroxyds and silica to be nearly as , often 
ith an excess of silica. The ratios of his analyses 
Bebe wg limits 1; 1-94—2-16 : 2:95—8'36.—( Berlin Acad. 
If we fp oh Rammelsberg, who has reg arded the small 
ent of iron in the zoisites, as peroxyd re Solies alumina, we 
the : ] 7-62 : 14°78: 23:25=1:1°98: 
6 While for y ade ens 98 : 25°65, showing an ex- 
te and ahem st “te the intermingled tale. 
q) fee of proto d as magnesia it would 
an 
analyses of 
ing po! 
“ri present in this species. 
ox XXVII, No. 81.—MAY, 1859. 
