HANDBOOK OF THE METEOKITE COLLECTIONS. 109 



south of Scott City it is stated to have occasioned light enough to enable one 

 to pick up a pin. Following the explosion there was a noise compared with the 

 discharge of a heavy battery of artillery or of a heavy wagon running rapidly 

 over tlie frozen ground, the noise gradually dying away like rolling thunder in 

 the distance. Some claim to have heard the wliistling of rocks through the air 

 like bullets or heavy hail, while Mr. Freed himself compared the sound to that 

 of " a mighty swish-h-h, resembling the sound of a sky rocket." 



A search extending over a period of several months resulted in the 

 finding of some 15 specimens, as noted above, scattered over an area 

 of 2 by 7 miles in the vicinity of Modoc, a small town on the Missouri 

 Pacific Eailroad. These were mostly complete individuals, the largest 

 of which weighed 4,640 grams. They were nearly all covered with 

 dull brown-black crust, as shown in the specimens, showing no ap- 

 preciable traces of flow structure or perceptible thickening in any 

 part, and the surfaces as a whole are remarkably free from pittings. 

 A broken fracture shows a gray, distinctly chondritic stone with 

 small black veins. The mineral composition is essentially olivine and 

 enstatite, together with metallic iron and troilite. Chondrites incon- 

 spicuous on broken surface. Chemical analyses by Wirt Tassin 

 yielded the following results: 



Metallic portion : 



Per cent. 



Iron (Fe) 6.56 



Nickel (Ni) .68 



Cobalt (Co) .034 



7.274 



Soluble silicate portion : 



Silica (SiOj) 17.38 



Ferrous oxide (FeO) 10.95 



Alumina AI2O3) -20 



Lime (CaO) -14 



Magnesia (MgO) 17.73 



46.40 



Insoluble silicate portion: 



Silica (SiOi) 26.75 



Ferrous oxide (FeO) 4.42 



Manganous oxide (MnO) .10(?) 



Alumina (AI2O3) 2.27 



Lime (CaO) 1.60 



Magnesia (MgO) 8.72 



Potash (K:0) Present, biA not determinable. 



Soda (Na^O) .44 



44.30 



