Smithsonian Report, 1948.—Glaze PLATE 4 
1. THE 70-INCH DISK BEING EXAMINED, PRIOR TO SHIPMENT, BY DR. G. K. BUR- 
GESS, THEN DIRECTOR OF THE BUREAU OF STANDARDS, AND PROF. C.C. CRUMP, 
FORMER DIRECTOR OF THE PERKINS OBSERVATORY 
The 8-inch core is resting on the surface of the disk. 
= a geome all 
2. THE EXTERIOR OF THE ANNEALING KILN FOR THE 200-INCH DISK 
Photograph courtesy Corning Glass Works. 
