2,20 



LIGHTING OF INTERIORS. 



that the amount of Hght due to reflection is considerably greater, 

 than before, because the ceiling now takes part in the reflection. 



In Figs. 8 and 9 are plotted the ratios Mern\\'"um"'nat°o"a against the 

 positions of the lamps. \Wc see that by passing from the dark 

 room to the one with light yellow walls, we increase the uni- 

 formity considerably. 



MAX. ILLUMIN/KTION . 

 MEAN ILLUMINATION. 



2'o 



f-5 



\'0 



/oo 



2. CO 



300 CENTiMSTRE.^ 



QIST/KNCE. OF LAfiP ABOVE VESTING PLANE 



MAX. ILLUMINATION 

 MBAN ILLUMINATION. 



O 100 zoo 300 CENTi METRES 



D/STAMC£ OF i./iAfP ABOVE TESr/NO PLANE 



nc-9 



