Shelf A5

Scope and Contents Alvin Pressure hull being machined at Lukens Steel, Houston, Texas. The runtime for this video is 22m 55. Black and white. 0:01 metal plate being removed from heat, put in press, and turned to shape. 4:15 close up of machine pressing sphere in to shape. 5:00 bent plate removed from press. 6:15 people measuring/testing surface of sphere. 8:20 close up of instrumentation. 8:55 cutting torch used on plates. 12:20 person working controls. 12:50 plates loaded onto press for shaping. 16:20 sphere...