448 H. S. Washington — Jerome Meteorite. 



are rounded. A few shallow pits are seen, and here and there 

 ovoidal nodules, which project slightly above the main surface, 

 or from the bottoms of shallow depressions. These measure 

 several centimeters in length, with a width of about two-thirds 

 of the length. 



A thin, dark brown crust covers the surface, but this has 

 suffered through atmospheric decomposition, and is much 

 corroded, lacking in places, and often dull and rusty. No signs 

 of ridges or other flow phenomena are to be seen on what is 

 left of the crust. Small, rough, wart-like processes are seen 

 generally over the surface, some due apparently to the projec- 

 tion of chondrules through weathering, while others are the less 

 altered fragments of crust. 



Parts of the meteorite, especially near the point of impact, 

 and the fragment (f lb.) which shows no fresh fracture surfaces, 

 are covered with a fine, yellowish white powdery substance, 

 which effervesces but slightly in acid, and is apparently a light 

 clayish soil. The same substance is found in the cracks pre- 

 viously mentioned. 



The fresh fracture is uneven, and the stone, as thus seen, is 

 fine-grained and compact. The general color is dark rusty 

 brown, which under the lens is seen to be a mottled brown 

 and black. Small, glistening streaks of nickel-iron are scat- 

 tered through it, but no troilite was seen. The lens also reveals 

 translucent grains of olivine and bronzite. Small rounded 

 chondrules are also seen here and there, but are not very 

 numerous. 



It is very evident that the oxidation of the iron from weath- 

 ering extends far into the mass, though possibly a section 

 through its center might reveal fresh substance. Of the 

 stones in the Yale collection it resembles most that from Salt 

 Lake City, and is also much like the decomposed portions of 

 the Bluff, Fayette Co., Texas, meteorite. 



Under the microscope the stone is seen to be composed of 

 quite numerous chondrules of bronzite and olivine, with frag- 

 mental crystals of olivine, bronzite and a little pyroxene, in a 

 rather brecciated groundmass of the same minerals, together 

 with some interstitial matter, which seems to be glass. Nickel 

 iron is present in the form of small, angular, irregular masses. 

 Patches and veins of dark, reddish-brown, and yellow ferrugi- 

 nous substance are present, and show that considerable atmos- 

 pheric decomposition has taken place. A few small fragments 

 of plagioclase are also to be seen, but no troilite, and nothing 

 which could be referred with certainty to maskelynite. 



On the whole I am inclined to class this stone with Bre- 

 zina's group 37, u krystallinisch Chondrit, breccienahnlich 



