Report on Meteorites. 389 
The following is, to'a short extent, a comparative table of the 
most abundant ehiomeical compounds, among meteoric and terres- 
asi) minerals. 
Fae 
1. Iron alloys. 
2. Silicates of magnesia, iron, lime, &e. 
_ 3. Sulphuret of iron. 
4. Oxides of i iron and chrome. 
5. Chlorides of iron and nickel. 
Ss ? ‘Terrestrial. 
1. Silicic acid. 
_ 2. Silicates of alumina, potassa, soda ain iron, (Feldspar, AL 
bite and Mica.) 
3. Silicates of alumina, lime, magnesia baa iron, (Hornblende, 
_ Pyrorene and Garnet). 
4. Water : 
3 : Carbonates of lime, magnesia and iron. 
_ 6. Sulphurets of iron. 
7. Chlorides of sodium, magnesium and calcium. 
8, Oxides of iron and manganese. so 
Pei If. 
| Astropetrology. 
“Binder this general head, the name of which is formed like that, 
of the first department, (astrolithology, ) with the exception of 
the two middle syllables, which are derived from the word 
mézgoc,a rock, instead of from 460s, a stone,—the former having 
reference to an individual species, the latter to a rock-mass, it 
is intended to embrace information of the same general nature as 
that, which, in respect to our own planet, is contained under Ge- 
4 ology. Aatrspeirligy therefore, will very naturally have two de- 
partments of its own: viz. Descriptive and clasts aoe 
Pology. | 
1. Descriptive Astropetrology. 
Under this head, the various rock-masses, or astropetrological 
Species, will be enumerated and ers They will form two 
