222 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1954 



figures 1 to 4. The ultraviolet and visible transmissive properties of 

 a number of australites (fig. 1) and of a group of bediasites (fig. 2) 



300 



380 



460 540 620 700 



WAVELENGTH, MILLIMICRONS 



780 



860 



Figure 1. — Spectral transmittance of five australites. Sample A from South Australia 

 Museum; others from H. H. Nininger. 



300 380 460 540 620 700 



WAVELENGTH, MILLIMICRONS 



780 



860 



Figure 2. — Spectral transmittances of six bediasites from Texas: No. 3, near Muldoun, 

 Fayette County; No. 4, eastern portion of Lee County; Nos. 5a, Sb, 5c, and 5d, near 

 Bedias, Grimes County. Courtesy of Virgil E. Barnes, University of Texas. 



illustrate the family character of specimens of this glass picked up at 

 scattered locations in the Uxo cases. The curves of figures 3 and 4 illus- 

 trate the types of variations in transmissive properties which may be 



