This is an Ernst Presser selenium photocell used by Eugene Augstin Lauste during his experimentation with sound-on-film technology ca. 1904-1913. Lauste used these cells in recording and reproducing ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Glass jar containing selenium ...

State and federal experts confirmed their confidence in research justifying stringent limits on selenium in Lake Koocanusa on Thursday, while lawyers for the Canadian coal mine responsible for the ...