Footage of a large photosphere being used to test neon light bulb, Middlesex.
A photosphere in use in laboratory in Middlesex.
M/S door opening and men entering with neon tube. M/S Man entering with neon tube. M/S Connecting neon tube to plug and leaving. M/S Man leaving chamber and light going on door starts to close. C/U Door closing camera pan to men at control panel. C/U Engineers at control panel. C/U Controller operating switches.
C/U Neon tube inside photosphere. C/U Switches being operated outside chamber. C/U 'Magic Eye'. C/U Operator C/U Engineer at control panel. C/U operating control panel C/U Neon tube inside chamber pan to hole inside of chamber C/U Gauge outside chamber pan up. M/S Engineer operates switch door opens and he walks in with another tube for testing.