Se ae ae 
Ss, a 2 
and the Products of its Transmutation. 131 
| portion of bases RO was observed to be less than that cor- 
responding to the formula. 
The deviations from the formula, whether positive or ne- 
gative in their value, which are indicated by these analyses 
as well as by-those of Rammelsberg, are, however, by no 
means so great as to admit of a doubt that the true oxygen 
ratio of scapolite is 1:2: 4; and in a subsequent part of the 
memoir, alterative processes are pointed out which tend to 
increase the percentage of silica, as well as others, wholly 
different, which increase the percentage of bases. 
Ill. ABNORMAL WERNERITE, 
3 (RO, 8i0,) + 2 R, O,, Si Oj. 
The author gives analyses of two varieties of Wernerite, 
whose composition does not appear to correspond with either 
of the formule proposed by Rammelsberg. 
1. Wernerite from Gouvernour, New York.—Occurs in 
fine crystals, imbedded in calcite; colourless, and more or 
less transparent. Density 2°633. Analysis gave— 
T. II. IIT. 
Silica, : , 52°25 ian 52°25 
Alumina, . ; 23°92 24-02 23:97 
Peroxide of iron, trace trace trace 
Lime, j ; 9°85 9°87 9°86 
Magnesia, . ; 0-68 0°91 0°78 
Potash, : =o 1:73 1:73 
Soda, é ; outs 8°70 8-70 
Volatile substances, 1:20 1-20 1:20 
98-49 
The quantities of oxygen are— 
Silica, ny 2:12 5° 
Alumina, . i Ga 11:20 2:06 
Peroxide of iron, trace trace trace 
Lime, ; 3 2°80 
Maonesia, . : 0:31 : tis 
mee ggg, Coen, eee 
Soda, ‘ ; 2:22 
So far as it is possible to judge from the exterior appear- 
+: ance and physical character, this mineral was in a perfectly 
unaltered state. This opinion is likewise confirmed through 
12 
