1060 General Notes. 
show the superiority of microscopical over chemical i 
tions in lithological work. Dr. Wadsworth supposes 
origin of the meteorite was similar to that of the 
either as rock or mineral, must therefore be abandoned. 
New MINERALS.—M. Weibull describes as new three r 
the 
is translucent with a ferari IA color. Specific gravity 417 
composition is: 
SiO, FeO MnO MgO Calg igi i 
29.94 46.88 18.83 3-01 L4 = 
It appears to be merely a variety of knebelite, a mineral 
scribed more than fifty years ago by Débereiner. iye 
Silfo ergite, apparently a manganiferous actinolite or anti 
lite, occurs in bladed crystals of a yellow color, resemblir 
olite. Its cleavage, luster, hardness and specific ravity 
about those of varieties of hornblende. Its composition sae 
SiO, FeO MnO MgO CaO His 
iri Su 8. Bey 808 0.44 = 
characters of the pyroxenes. Its composition | is: 
SiO, FeO MnO CaO MgO 
48.29 aay Sij M iy; 2.83 
are thé varieties, It wiil, indeed, not be ri 
mineral species will be ives ‘and subdivided into g 
es and varieties, as has already been done for garı 
hornblende, mica, etc. A mineralogical text- 
something more than a catalogue Meanwhile min 
na new species, should indicate, if possible, 
position 
MINERALOGICAL Nores. —Mineralogists frequently 
or phosphoric acid in a mineral under examinati 
ally use molybdate of ammonia acidulated w 
reagent, as prescribed i in works on passen: 
f min 
