66 Scientific Intelligence. 



Na 2 - -81 



K 2 __>. - -20 



H 2 0_. -- '20 



Fe__. -. _ _-. 11-46 



M 1-15 



Co -05 



S 1-98 



P -04 



P.O.- - -03 



C - -06 



Ni, Mn, Cu, Sn _ -02 



Ti0 2 _ _ -02 



SnO„- - - '02 



9982 

 The following table also gives the average composition of iron 

 meteorites compiled from 318 analyses. Further, the proportion 



Average Composition of Iron Meteorites. 



Fe 90-85 



Ni _ 8-52 



Co _._ _ _ -59 



P -11 



S-_ -04 



C -03 



Cu __. -02 



Cr __ -01 



100-23 

 of elements present in meteorites of both classes has been com- 

 puted as given below, following out the suggestion of the author 

 that this may very probably correspond with the proportions of 

 the elements in the earth as a whole. 



Proportion of Elements in the Earth as a "Whole 

 as Deduced from Meteorites. 



Iron _ 72-06 



Oxygen 10*10 



Nickel _ 6-50 



Silicon . _ 5-20 



Magnesium 3*80 



Sulphur _ _ -49 



Calcium _ *46 



Cobalt -44 



Aluminium -39 



Sodium _ -17 



Phosphorus *14 



Chromium __ *09 



Potassium -04 



Carbon -04 



Manganese '03 



Other elements *05 



100-00 



