Smithsonian Report, 1924. — Berry 



Plate i 



I. Clear Fused Quartz Disk; I iVi Inches Diam- 

 eter, IVz Inches Thick 



2. Clear Fused Quartz Tube; 5 Inches Diam- 

 eter, 13 Inches Long, 'c-Inch Wall 



