ILLUMINATION AND PHOTOMETRY 443 



breaks up tho light in the horizontal pianos and eliminates glare. 

 Figure 404 shows a roadway illuminated by the use of prismatic 

 refractors. Figure 400 shows the effect on the light-distribution 

 curve of placing a reflector on a lamp used for interior illumi- 



{97. General Elc-trir or- Fio. 398. Ornamental pole 



namcnt:il luminous :m- himp \\ith steps and wooden croaa- 

 MiouriN-d on Lynn-typo pole. arm* for pendant type of IIIIM- 



iinHi- ire 



nation. Th.- upward liudit ifl rr-lirr,-tcd downward where it is 



useful. 



type of reflector to be u i'termined almost entire 1\ 



by the condition- arnl tin- illumination dr-in-d. Such re Hectors 



ibsorb from : the light emitt.-d by th- 



