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Papers of the General Electric Company's Illumination Group

Hirst Research Centre material

OSRAM-GEC research material

Hirst Research Centre Lighting Group collected papers

Folder entitled 'Collected Papers of the Illumination Group - Vol. I'

Report entitled 'Special Lamp Production Section'

Album of photographs showing experiments relating to street lighting

Folder entitled 'Computer Programmes' containing notes relating to the use of computer programmes

Folder containing extracts from Hirst Research Centre reports

Folder entitled 'Lab. Green Book' containing research notes

Binder entitled 'Collected Papers of the Illumination Group - Vol. II'

Binder entitled 'Collected Papers of the Illumination Group - Vol. IV'

Memos entitled 'Reports - Illumination Group'

Binder entitled 'Collected Papers of the Illumination Group - Vol. III'

Memo entitled 'ES3820, BS4533 & IEC 162' relating to British Standards for thermal testing of fluorescent lamps

Collected papers of the Illumination Group

Memo entitled 'Tw, ∆T and All That' relating to the insulation of electrical components

Folder entitled 'H R C Lighting Lab. Collected Papers 128 - May 1958 to 180 - May 1969'

Material produced by bodies outside of GEC

Folder entitled 'H R C Lighting Group Collected Papers 181-'

Booklet entitled 'A review of the development of ballasts and circuits for operting discharge lamps'

Folder entitled 'Drawings - High Intensity Road Traffic Signals Optical System Design'