100 



BULLETIN 94, UNITED STATES NATIONAL MUSEUM. 



Iron, 80.92 ; nickel, 12.01 ; cobalt, 0.75. Analyses of the silicate por- 

 tion yielded : 



Constituents. 



Silica (SiOs) 



Alumina (AljOs) 



Ferrous oxide (FeO) 



Magnesia (MgO) 



LlmeCCaO) 



Soda (Na20) with a little 

 potash (KsO) 



Soluble in 

 HCl 58.05. 



Per cent. 



41.08 



.32 



18.45 



41.06 



100. 91 



Insoluble 



inHCl 



41.95. 



Per cent. 

 56.03 

 5.89 

 15.21 

 21.00 

 .10 



2.97 

 101.20 



From these results was calculated the mineral composition as below 



Per cent. 



Nickeliferous iron 7. 00 



Magnetic pyrites 6. 10 



Bronzite 



Olivine 



Albite or oligoclase 



Chrome iron 



86.90 



100. 00 



Reference. — J. L. Smith, Amer. Journ. Sci., vol. 50, 1870, pp. 

 339-341. 



LUTSCHAUNIG (LAMPA), ATACAMA DESERT, CHILE. No. 419. 



Stone, Cg. 70-gram fragment from a mass found in 1860. 



MACAO, RIO GRANDE DO NORTE, BRAZIL. No, 134. 



Stone, Cia or Ci. Weight, 68.5 grams. Fell November 11, 1836, 

 at 5 o'clock in the morning, with the usual detonations and brilliant 

 light. The stones were first stated to fall over an area of some ten 

 leagues radius. Very many stones fell, weighing from one-half to 

 40 kilograms each. Total weight not known. Willfing accounts 

 for but 2,902 grams. No analysis seems to have been made, nor a 

 satisfactory mineralogical determination. 



Reference. — O. A. Derby, Meteoritos Brasileiros, Revista do Obser- 

 vatorio, 1888, p. 7. 



McKINNEY, COLLIN COUNTY, TEXAS. Nos. 188, 340. 



Stone, Cs ( ?). Two pieces, weighing 66 and 1,168 grams. From a 

 mass weighing about 100 kilograms, thought to have fallen in 1870. 

 Fragment with reddish brown, much oxidized crust. Ground green- 

 black, fine, and compact. Susceptible of a polish. Chondrules 



