Jacob Riis?
Flashes from the slums.
http://www.socialismtoday.org/56/riis.html
"The 'blinding flash' quoted above alerts us to the primitive artificial light to which Riis had access. In the dark interiors in which he worked, the available light was often so poor that some form of illumination was essential, and his need was answered by Blitzlichtpulver (flashlight powder), invented in Germany in 1887 by Adolf Miethe and Johannes Gaedelicke. The formula had been modified by Piffard as he found the German version to be extremely dangerous. The mixture was ignited in a metal tray. Because it burned instantaneously - in a flash - it was an improvement over the magnesium flare with its several seconds' duration. Nevertheless, the highly inflammable magnesium was extremely unstable and twice Riis almost caused major fires, once nearly blinding himself. The flash reveals with pitiless detail the sordid interiors but portrays almost tenderly the faces of those destined to live in them - hence the title, Flashes from the Slums."
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