Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 554
ltimately a complete dry \ .111111111 i- obtained. I he inertthen l< d into the hull) in BUCh a way that wlnn the lamp fc burning the pressure within I In- bulb i- slightly under that of the atmoepl Apart from such technical details, a visitto lie■-• factorii - i- an interesting experi-• in… … Shaping and mounting the filaments of Mazda half-watt lamps.
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