Mineralogy and Geology. 269 
cible containing a porous cell, the fused chlorid standing much higher 
in the cell than in the crucible. The chlorine pole is a sheet iron eyl- 
~ collect under it without paler thei cath itself.—Ann. der Chemie 
nd Pharmacie, xciv, 107, April, 1855. W. G. 
II. MINERALOGY AND GEOLocY, 
1. Hunt’s Wilsonite a Seapeli extract from a letter from E. 
mer measurements and the apparently obliqu ge of the 
mineral or rock-mass. Before your letter reached me, | had arrived at 
the genereao Dy in repeating my earlier ipa icui that this oblique 
Structure arose from rock-cleavage, so to say, Or, as you express it, 
from the Reaence of joints. Being determined, if possible, to set the 
matter at rest, I took steps to ceaagi some ores specimens of the sub- 
stance; and these I have now broken up and subjected to a very close 
examination. I find, that beaten the ke more facile ac there are 
others in the same general or aver yea direction, but with exceedingly 
variable inclinations. All ef these arise from a kind o composition 
parallel to the principal oo and hence the variable measurements, 
and the error ae which I was led in eohisidering. the substance to oe 
several of de sapssarogy that I have oe ee and hence, of course, 
Lt ual 90°. 
substance is fully proved, and the viaavage directions shewn to be those 
of Scapolite. 
and i exactly in the sa ne, and giving with a an ee. 126° 
thereabouts—an impossible angle (as being | 135°) unless 
Caused by composition, You ay remark the  pemianiy in suas 
cottirin the: statements of Prof. Chapman.— J. p. p. 
