946 



A TREATISE ON METAMORPHLSM. 



Constituents of meteorites — Continued. 



Relative proportions. P SS° f ^° f 



definite meteorites. 



Iron sulphide: 



Troilite 



Pyrrhotite (?) 



Sehreibersite 



Graphite 



Cohenite 



Glass. 



Chromite 



Amorphous carbon . 



Diamond 



Daubreelite 



Tridymite 



Lawreneite 



Magnetite 



Oldhamite 



Hydro-carbons: 



(a) C and H . . . . 



(b) C, H, andS. 



(c) C, H, andO. 



ACCESSORY. 



FeS. 

 FeS. 

 (FeNiCo) 3 P . 



Iron. Stone. 



63. 09 17. 55 



20. 70 4. 15 



S. 12 71. 60 



7. 52 2. 20 



Most widely distrib- 

 uted constituent of 

 iron meteorites 

 next to nickel iron. 



FeS. Cr»S 3 



Si0 2 



FeCl. 



Fe 3 4 



CaS* 



CH., 



C 4 H 12 S 5 



CoH s O : 



4.57 (one meteorite). 



iLess tli an 1 in major- 

 ity of meteorites in 

 which present. 



The list of elements in meteorites given by Farrington a includes all 

 those, except fluorine, which compose as much as 0.01 per cent of the outer 

 part of the earth and a number of others. Farrington has given also a list 

 of the eight chief elements in meteorites, including both falls and finds, in 

 order of their abundance (column l). b For comparative purposes there 

 are placed opposite these, in order of abundance, the eight elements 

 which, according - to Clarke, are most plentiful in the outer part of the 

 earth (column 2). 



"Farrington, cit., pp. 393, 394. 



6 Farrington, cit. , p. 394. 



