272 Alvin pressure hull being machined at Hahn and Clay, Houston, Texas. Dyers dock testing floatation bags for Alvin. Early days before Alvin came to WHOI, heat treatment

0:01 Hahn and Clay building, exterior shots. 1:12 rotating sphere on machine. 2:27 installing hatch with crane. 3:17 welding sphere. 3:54 sign for Manned Spacecraft Center and shots of construction, scenes of farm, city, buildings. 5:29 welding viewports. 6:02 crack in metal. 7:05 Houston International Airport, people boarding planes, interior scene of plane, shots from plane window. 8:29 WHOI dock, Bill Rainnie, Marvin McCamis. 9:21 sphere in warehouse. 10:02 grinding sphere. 10:34 hatch. 11:03 lowering viewport with chain. 11:24 welding, work on sphere. 12:20 sphere. 12:32 General Welding Works building, exterior view. 13:07 workers inside building. 14:23 lifting sphere with crane. 15:41 wires connected to sphere inside heating chamber. 16:03 closing top of heating chamber. 16:42 installing viewport. 17:19 opening heating area. 18:33 welding and heating sphere. 20:05 viewport attached. 20:49 rotating sphere. 21:42 welding. 21:57 rotating half-sphere. 22:33 testing surface of sphere. 23:00 welding. 23:30 welding half-spheres together. 24:26 rotating sphere on machine. 25:49 building interior. 26:22 closing heating area. 27:18 machining hatch entrance. 27:56 cleaning inside of metal vessel. 28:16 moving viewport with chain. 28:35 testing inside sphere. 28:57 welding. 29:04 sphere outside. 30:17 sphere painted/coated and viewports covered. The runtime for this video is 31m 36.