Salt Lake Herald | 1908-01-19 | Page 28 | Lighting Methods Compared by Means of Night Photographs

LIGHTING METHODS COMPARED BY BYI I MEANS OF NIGHT PHOTOGRAPHS I i I S e 1 I I it m i it ie t e I Ic c t T I S t i ilc lc m up L 4 0 5 S 4 1 w Photographs Showing Difference S In i Diffusion of o I Light by Old and an d New Methods RA A The photographs reproduced above 1 were er taken to show the difference be between between i tween the effectiveness of arc lights light suspended In the middle of ot the street from wires and ad those placed place upon poles pole as a Is the present custom The photographs were taken at night 1 by an expert exper in the city engineers of office i lice fice and under the direction of O 0 H Skidmore SkIdmore electrical Inspector The ex cx exposure exposure in each instance was ten min minutes mm utes ut The upper picture shows the radia radiation radiation tion ton of of light from a I lamp at a the top of ot ofa ota ofa a a pole at at Third avenue and F street looking west veat wet on Third avenue The camera camer was set t directly under the pole and the house in the foreground is shown In every ever detail Back of O It I however and looking towards the west the shadow is very deep dep and tho the light at the Intersection of ot E street one block distant is shown by a mere dot and the lamp at D street Is Just a little less distinct Now notice the difference In the cut below Here the lamps tested are sup supported supported ported pore In the middle of ot the street with without wih without out being fastened to the tops of poles pole The lights are of the tho same pattern as asIn asIn asIn In the upper cut cut so that the compari comparison son is made on an equal basis This picture was taken at the Intersection of of Second avenue and G street look lookIng lok looking Ing east The house being further In Inthe Inthe inthe the background than in the upper pic picture picture picture ture does not riot show up so well wel al although although although though the light on the snow and an trees tr IB Is equally as powerful as that in inthe Inthe inthe I the upper picture The Tho principal fac tac tor to t be noticed hs is i the diffusion of ot light In the lower picture the sus mus suspended UH pende light at H street one block distant shows up brilliantly in com corn comparison comparIson parison with wih a light one block away In Inthe Inthe Inthe the upper picture The white snow can an anbe anbe be distinctly seen een nearly to the other light and the roadway appears very clearly clery Even the outlines of ot the trees In the distance is shown In the pic pie picture picture ture showing the pole method of ot erect erecting er erectIng C CIng ing lights there is only a dense dark darkness darkness darkness ness in the background The council when It orders in the new lights has decided to do o away with wih the pole system and will wi have all al lights suspended In the middle of the streets from poles Dotes on the sides side The rh city engineer had these pictures res made to show the time advantage of the proposed propos d scheme