:;_> 



.I.U ERIC. I.V MUSEUM GUIDE LEAFLETS 



presence of from 8 to 10 per cent of stony matter included in the niekel- 

 iron, and the proportions of the mineral constituents vary considerably 

 in different parts of the mass. The nickel-iron is an alloy consisting 

 of 89.89 per cent iron, 9.58 per cent nickel, 0.40 per cent cobalt and 0.04 

 per cent, copper, while the stony matter consists of olivine, carrying an 

 unusual quantity of lime and associated with noteworthy quantities of 

 schreibersite and chromite. 



BRENHAM. 



(Siderolite. ) 



Brenham is classed as a siderolite, hut some of its fragments are 

 entirely of nickel-iron. The etched section shown in the Foyer illustrates 

 clearly the peculiar texture of the mass. The metallic portions consist 



BRENHAM 



Siderite dct't) and Siderolite (right) in the same piece. 



of about 88 per cent, iron, 10 percent, nickel and 2 per cent, other sub- 

 stances. The dark green and fjlasM portions are crystals of olivine, 



which break out from the iron almost entire. 



