G. P. Merrill — New Stony Meteorite. 359 



Si0 o 26-15 



Fed 4-42 



MnO 0-10 (?) 



A1 2 3 2-27 



CaO .1-60 



MgO 8-72 



K 2 .present but not determinable 



Na 2 0-44 



The general composition of the portions of the meteorite 

 analyzed, as derived from the combination of the several deter- 

 minations, is : 



Fe 6-56 



Ni 0-68 



Co 0-034 



S 1-38 



P _ 0-051 



SiO, 44-13 



FeO 15-37 



MnO 0-10 (?) 



CaO 1-74 



MgO 26-45 



A1 2 3 ------ 2-47 



K 2 - trace 



Na 2 0-44 



99-40 



The miner alogical composition of the meteorite may be ap- 

 proximately calculated from the above summation. The amount 

 of nickel-iron is determined directly ; troilite and schreibersite 

 are calculated from the amounts of sulphur and phosphorus 

 found, assuming- that schreibersite has the formula Fe 2 NiP. 

 The soluble silicate is olivine. The insoluble silicates are 

 regarded as enstatite and the feldspathic mineral noted, the 

 amount of alumina found furnishing the basis for the calcula- 

 tion : 



Nickel iron 4-59 



Troilite 3-79 



Schi-eibersite 0-34 



Olivine 46-40 



Enstatite 29*94 



Other insoluble silicates . . 14-36 



99-42 



It must be confessed that the last item in the calculation is 

 not wholly satisfactory, the 14'36 per cent of other insoluble 

 silicates not being accounted for in the microscopic examina- 

 tion. It undoubtedly includes the feldspathic constituent and 



