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THE AMERICAN MUSEUM JOURXAL 



pronounced and somewhat more elongated in the round edge shown in 

 Figure 3. The flat side shown in Figure 1 has comparatively few round 

 piezoglyphs, but it has many pits, grooves and points due to the flowing 

 of the melting surface of the mass during flight through the atmosphere. 

 The almost square edge, which is illustrated in Figure 4 and which is 

 considered to be an abrupt fracture occurring when the meteorite was 

 near the end of its atmospheric flight, has an oxidized skin like the rest 

 of the mass but shows piezoglyphs very imperfectly. 



Figure 1 shows the side which was in front during most of the meteor- 

 ite's atmospheric flight and is called l)y the (xermans the "brustseite." 

 The position of the furrows indicates that the line of flight was toward the 

 upper right hand quarter of the mass as shown in this picture. Although 

 the iron is unusually uniform and dense in structure, as will be brought 

 out under the discussion of its composition, it evidently yielded unequally 

 to the heat produced l)y friction with the atmosphere, and the air in 

 passing over its surface plowed deep furrows ending in sul^conical pits 

 and left sharp projections pointing forward in the direction of flight. 



A piece of the iron which had been sawed from the small entl of the 

 mass was polished and etched with dilute nitric acid at the Museum and 



was afterwards polished again and 

 treated with dilute and strong nitric 

 acid and picric acid in succession by 

 the chemists, Booth, Garrett and Blair, 

 Philadelphia, picric acid proving to be 

 the best mordant. The surface does 

 not show the Widmanstatten lines 

 usually characteristic of meteoritic iron, 

 but instead it possesses an extremely 

 fine granular crystalline structure, 

 which is shown magnified 100 diam- 

 eters in Figure 5 from a photomicro- 

 graph made by the analysts. The 

 iiomogeneous character of the mass 

 and the paucity of nonmetallic contents 

 are indicated by the high specific 

 gravity. The chemical analysis, made by Booth, Garrett and Blair, 

 resulted as follows: 



FIG. 5. GUFFEY METEORITE. PHOTO- 

 MICROGRAPH. 



Polished .section nuignified KM) diam- 

 eters to show c;yptoc;ystal- 

 Hne structure. 



