Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 208
Fig. 11.—Illiimiuatiuu of IriutiDg Machines at Messrs. Eyre and Spottiswoodes … Fig. 12.—lUumlnatioD of Printing Machines at Messrs. Eyre and Spottiswoodes. 180 TflE ILLUMINATING ENGINEER. various works, and the results aretabulated in the following summary :— •Surface brightness of wall (taken within 6 ft. above the floor unless Descrip- otherwise tion Works. Room. stated).…
Lighting
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