Etching the Cornerstone
This file appears in: Cornerstones & Time Capsules
On November 3, 1950, President Richard Carlton inscribed the date on the cornerstone of Building 42 using a sandblast stencil, a 3M product that simplified stone carving techniques.
This file appears in: Cornerstones & Time Capsules
Cornerstones & Time Capsules
Setting the Cornerstone, Building 21
President William L. McKnight, accompanied by chief engineer E. M. Johnson, supervised the installation of the cornerstone in October 1939.
The mason worked for…