METEORITES OF NORTH AMERICA. 225 



From these several analyses it is possible to arrive at the following approximation of the relative quantities of the 

 different constituents: 



Nickel iron 2. 59 



Troilite 4. 43 



Schreibersite 08 



Chromite , 80 



Olivine 40. 48 



Pyroxenes 51. 62 



100.00 



In the above the amount of the nickel iron is given aa directly determined. The sulphide and phosphide of iron 

 are calculated from the amount of sulphur and phosphorus found; the chromite is similarly calculated. The soluble 

 silicate is regarded as olivine; the insoluble silicate as being largely enstatite, with some augite. 



The meteorite is chiefly preserved in the U. S National Museum. 



BIBLIOGRAPHY. 



1. 1904: Glenn. Amer. Journ. Sci., 4th ser., vol. 17, p. 215. 



2. 1907: Merrill. Notes on the composition and structure of the Hendersonville, North Carolina, meteorite. Proc. 



U. S. Nat. Mus., vol. 32, pp. 79-82. (Two plates; analysis by Tassin.) 



Henry County, 1889. See Hopper. 

 Henry County, 1857. See Locust Grove. 



HEREDIA. 



San Jos6, Costa Rica, Central America. 



Latitude 10° 2' N., longitude 84° W. 



Stone. Brecciated spherical chondrite (Ccb) of Brezina; Canellite (type 48) of Meunier. 



Fell at night, April 1, 1857; described 1859. 



Weight: Several stones of which one weighed 1 kg. Assignable weight, 707 grams (1.5 lbs.). 



The original description of this meteorite, presumably by Domeyko, 2 the present writer 

 has been unable to consult. The following account was given by Buchner: 3 



Several stones of considerable size resulted from this fall, which was preceded by a swiftly moving fireball and a 

 loud detonation. 



The stone is covered with a thin black crust, which is not distinguishable from the inner substance which is gray 

 and appears to contain much graphite in flat, thin flakes. It is very compact and contains shining globules of metallic 

 iron. 



Analysis (Domeyko): 

 A. The magnetic portion (26.1 per cent): 



B. Nonmagnetic portion (73.9 per cent): 



Si0 3 AlA FeO NaO KO CaO MgO 



Soluble 33.6 30.9 0.1 35. 1 (with some Ni and MnO)= 99. 7 



Insoluble 56.7 3.5 14.5 2.3 0.1 3.2 19. 6 (with 0.13 chromite) =100.03 



Mineralogical composition: 



Nickel iron 26. 1 



Olivine 38.1 



Oligockse 6. 4 



Augite .■ 29. 4 



To which add magnetic pyrites and a phosphide, with chromite, not over 0.002 of the whole. 



Brezina 5 remarks that the Tubingen piece resembles Cgb and is very rusty. 

 The meteorite is distributed, Gottingen having the largest piece (422 grams). 

 716°— 15 : 15 



