5.S 



NA TURE 



{Nov. 17, 1887 



Map 2.— Spectra of olivine and meteorites under various conditions. 



3 4 5 6 7 



COOL HYDROGEN 



DHURMSALAMET.SPARK 



OCT 14,15. 



. , . ' FLAME 

 OCT 15. 



TT 



BITBURG ■' 9 " 

 OCT 2a. 



olivine: glow heated 



OCT 2L 



LIMERICK MET SPARK 



OCT 24. 



■> ' GLOW 



I OCT 25. 





Map 2 a.— Spectra of olivine and meteorites under var'ous conditions. 



